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Finding the Fourth Proportional to 40,456.60, 60,686.70 and 13,802.20

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Solution

The fourth proportional to 40,456.60, 60,686.70 and 13,802.20 is: 20,703.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,456.60 : 60,686.70 = 13,802.20 : x
  2. Step 2: Convert to fraction form
    40,456.60/60,686.70 = 13,802.20/x
  3. Step 3: Cross multiply
    40,456.60x = 60,686.70 × 13,802.20
  4. Step 4: Simplify right side
    40,456.60x = 837,609,970.74
  5. Step 5: Solve for x
    x = 837,609,970.74/40,456.60
  6. Step 6: Final answer
    x = 20,703.91

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1.5x scale

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.