Home / 20,862,004.70-31,293,007.05-13,209,254.30

Finding the Fourth Proportional to 20,862,004.70, 31,293,007.05 and 13,209,254.30

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Solution

The fourth proportional to 20,862,004.70, 31,293,007.05 and 13,209,254.30 is: 19,813,881.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862,004.70 : 31,293,007.05 = 13,209,254.30 : x
  2. Step 2: Convert to fraction form
    20,862,004.70/31,293,007.05 = 13,209,254.30/x
  3. Step 3: Cross multiply
    20,862,004.70x = 31,293,007.05 × 13,209,254.30
  4. Step 4: Simplify right side
    20,862,004.70x = 413,357,287,935,142.88
  5. Step 5: Solve for x
    x = 413,357,287,935,142.88/20,862,004.70
  6. Step 6: Final answer
    x = 19,813,881.45

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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.