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Finding the Fourth Proportional to 9,210.81, 12,711.06 and 5,019.06

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Solution

The fourth proportional to 9,210.81, 12,711.06 and 5,019.06 is: 6,926.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,210.81 : 12,711.06 = 5,019.06 : x
  2. Step 2: Convert to fraction form
    9,210.81/12,711.06 = 5,019.06/x
  3. Step 3: Cross multiply
    9,210.81x = 12,711.06 × 5,019.06
  4. Step 4: Simplify right side
    9,210.81x = 63,797,572.80
  5. Step 5: Solve for x
    x = 63,797,572.80/9,210.81
  6. Step 6: Final answer
    x = 6,926.38

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.