Home / 21,168,781.65-31,713,106.64-12,506,978.61

Finding the Fourth Proportional to 21,168,781.65, 31,713,106.64 and 12,506,978.61

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Solution

The fourth proportional to 21,168,781.65, 31,713,106.64 and 12,506,978.61 is: 18,736,796.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168,781.65 : 31,713,106.64 = 12,506,978.61 : x
  2. Step 2: Convert to fraction form
    21,168,781.65/31,713,106.64 = 12,506,978.61/x
  3. Step 3: Cross multiply
    21,168,781.65x = 31,713,106.64 × 12,506,978.61
  4. Step 4: Simplify right side
    21,168,781.65x = 396,635,146,340,594.06
  5. Step 5: Solve for x
    x = 396,635,146,340,594.06/21,168,781.65
  6. Step 6: Final answer
    x = 18,736,796.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.