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Finding the Fourth Proportional to 19,909.40, 27,475.44 and 10,957.40

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Solution

The fourth proportional to 19,909.40, 27,475.44 and 10,957.40 is: 15,121.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,909.40 : 27,475.44 = 10,957.40 : x
  2. Step 2: Convert to fraction form
    19,909.40/27,475.44 = 10,957.40/x
  3. Step 3: Cross multiply
    19,909.40x = 27,475.44 × 10,957.40
  4. Step 4: Simplify right side
    19,909.40x = 301,059,386.26
  5. Step 5: Solve for x
    x = 301,059,386.26/19,909.40
  6. Step 6: Final answer
    x = 15,121.47

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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.