Home / 20,781,684.60-31,119,382.80-15,360,986.40

Finding the Fourth Proportional to 20,781,684.60, 31,119,382.80 and 15,360,986.40

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Solution

The fourth proportional to 20,781,684.60, 31,119,382.80 and 15,360,986.40 is: 23,002,197.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781,684.60 : 31,119,382.80 = 15,360,986.40 : x
  2. Step 2: Convert to fraction form
    20,781,684.60/31,119,382.80 = 15,360,986.40/x
  3. Step 3: Cross multiply
    20,781,684.60x = 31,119,382.80 × 15,360,986.40
  4. Step 4: Simplify right side
    20,781,684.60x = 478,024,415,967,193.94
  5. Step 5: Solve for x
    x = 478,024,415,967,193.94/20,781,684.60
  6. Step 6: Final answer
    x = 23,002,197.62

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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.