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Finding the Fourth Proportional to 18,121,305.19, 25,007,405.25 and 9,972,543.19

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Solution

The fourth proportional to 18,121,305.19, 25,007,405.25 and 9,972,543.19 is: 13,762,111.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,121,305.19 : 25,007,405.25 = 9,972,543.19 : x
  2. Step 2: Convert to fraction form
    18,121,305.19/25,007,405.25 = 9,972,543.19/x
  3. Step 3: Cross multiply
    18,121,305.19x = 25,007,405.25 × 9,972,543.19
  4. Step 4: Simplify right side
    18,121,305.19x = 249,387,428,961,462.94
  5. Step 5: Solve for x
    x = 249,387,428,961,462.94/18,121,305.19
  6. Step 6: Final answer
    x = 13,762,111.85

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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.