Home / 7,428.81-11,143.22-2,988.51

Finding the Fourth Proportional to 7,428.81, 11,143.22 and 2,988.51

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Solution

The fourth proportional to 7,428.81, 11,143.22 and 2,988.51 is: 4,482.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,428.81 : 11,143.22 = 2,988.51 : x
  2. Step 2: Convert to fraction form
    7,428.81/11,143.22 = 2,988.51/x
  3. Step 3: Cross multiply
    7,428.81x = 11,143.22 × 2,988.51
  4. Step 4: Simplify right side
    7,428.81x = 33,301,624.40
  5. Step 5: Solve for x
    x = 33,301,624.40/7,428.81
  6. Step 6: Final answer
    x = 4,482.77

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.