Home / 20,678,928.52-31,004,028.78-9,158,117.80

Finding the Fourth Proportional to 20,678,928.52, 31,004,028.78 and 9,158,117.80

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Solution

The fourth proportional to 20,678,928.52, 31,004,028.78 and 9,158,117.80 is: 13,730,815.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678,928.52 : 31,004,028.78 = 9,158,117.80 : x
  2. Step 2: Convert to fraction form
    20,678,928.52/31,004,028.78 = 9,158,117.80/x
  3. Step 3: Cross multiply
    20,678,928.52x = 31,004,028.78 × 9,158,117.80
  4. Step 4: Simplify right side
    20,678,928.52x = 283,938,547,841,830.31
  5. Step 5: Solve for x
    x = 283,938,547,841,830.31/20,678,928.52
  6. Step 6: Final answer
    x = 13,730,815.29

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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.