Home / 20,986,681.90-28,963,776.10-12,616,761.36

Finding the Fourth Proportional to 20,986,681.90, 28,963,776.10 and 12,616,761.36

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Solution

The fourth proportional to 20,986,681.90, 28,963,776.10 and 12,616,761.36 is: 17,412,426.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986,681.90 : 28,963,776.10 = 12,616,761.36 : x
  2. Step 2: Convert to fraction form
    20,986,681.90/28,963,776.10 = 12,616,761.36/x
  3. Step 3: Cross multiply
    20,986,681.90x = 28,963,776.10 × 12,616,761.36
  4. Step 4: Simplify right side
    20,986,681.90x = 365,429,051,138,171.50
  5. Step 5: Solve for x
    x = 365,429,051,138,171.50/20,986,681.90
  6. Step 6: Final answer
    x = 17,412,426.27

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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.