Home / 60,420.48-90,640.44-20,988.87

Finding the Fourth Proportional to 60,420.48, 90,640.44 and 20,988.87

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Solution

The fourth proportional to 60,420.48, 90,640.44 and 20,988.87 is: 31,486.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,420.48 : 90,640.44 = 20,988.87 : x
  2. Step 2: Convert to fraction form
    60,420.48/90,640.44 = 20,988.87/x
  3. Step 3: Cross multiply
    60,420.48x = 90,640.44 × 20,988.87
  4. Step 4: Simplify right side
    60,420.48x = 1,902,440,411.90
  5. Step 5: Solve for x
    x = 1,902,440,411.90/60,420.48
  6. Step 6: Final answer
    x = 31,486.68

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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.