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Finding the Fourth Proportional to 15,471.78, 21,343.23 and 9,797.10

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Solution

The fourth proportional to 15,471.78, 21,343.23 and 9,797.10 is: 13,515.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,471.78 : 21,343.23 = 9,797.10 : x
  2. Step 2: Convert to fraction form
    15,471.78/21,343.23 = 9,797.10/x
  3. Step 3: Cross multiply
    15,471.78x = 21,343.23 × 9,797.10
  4. Step 4: Simplify right side
    15,471.78x = 209,101,758.63
  5. Step 5: Solve for x
    x = 209,101,758.63/15,471.78
  6. Step 6: Final answer
    x = 13,515.04

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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.