Home / 15,445.28-21,306.64-9,770.47

Finding the Fourth Proportional to 15,445.28, 21,306.64 and 9,770.47

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Solution

The fourth proportional to 15,445.28, 21,306.64 and 9,770.47 is: 13,478.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,445.28 : 21,306.64 = 9,770.47 : x
  2. Step 2: Convert to fraction form
    15,445.28/21,306.64 = 9,770.47/x
  3. Step 3: Cross multiply
    15,445.28x = 21,306.64 × 9,770.47
  4. Step 4: Simplify right side
    15,445.28x = 208,175,886.92
  5. Step 5: Solve for x
    x = 208,175,886.92/15,445.28
  6. Step 6: Final answer
    x = 13,478.29

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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.