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Finding the Fourth Proportional to 15,480.59, 21,368.03 and 9,891.59

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Solution

The fourth proportional to 15,480.59, 21,368.03 and 9,891.59 is: 13,653.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,480.59 : 21,368.03 = 9,891.59 : x
  2. Step 2: Convert to fraction form
    15,480.59/21,368.03 = 9,891.59/x
  3. Step 3: Cross multiply
    15,480.59x = 21,368.03 × 9,891.59
  4. Step 4: Simplify right side
    15,480.59x = 211,363,635.57
  5. Step 5: Solve for x
    x = 211,363,635.57/15,480.59
  6. Step 6: Final answer
    x = 13,653.47

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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.