Home / 20,781,688.60-31,119,388.80-15,360,990.40

Finding the Fourth Proportional to 20,781,688.60, 31,119,388.80 and 15,360,990.40

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Solution

The fourth proportional to 20,781,688.60, 31,119,388.80 and 15,360,990.40 is: 23,002,203.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781,688.60 : 31,119,388.80 = 15,360,990.40 : x
  2. Step 2: Convert to fraction form
    20,781,688.60/31,119,388.80 = 15,360,990.40/x
  3. Step 3: Cross multiply
    20,781,688.60x = 31,119,388.80 × 15,360,990.40
  4. Step 4: Simplify right side
    20,781,688.60x = 478,024,632,610,667.56
  5. Step 5: Solve for x
    x = 478,024,632,610,667.56/20,781,688.60
  6. Step 6: Final answer
    x = 23,002,203.61

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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.