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Finding the Fourth Proportional to 59,991.50, 89,987.70 and 20,549

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Solution

The fourth proportional to 59,991.50, 89,987.70 and 20,549 is: 30,823.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,991.50 : 89,987.70 = 20,549 : x
  2. Step 2: Convert to fraction form
    59,991.50/89,987.70 = 20,549/x
  3. Step 3: Cross multiply
    59,991.50x = 89,987.70 × 20,549
  4. Step 4: Simplify right side
    59,991.50x = 1,849,157,247.30
  5. Step 5: Solve for x
    x = 1,849,157,247.30/59,991.50
  6. Step 6: Final answer
    x = 30,823.65

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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.