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Finding the Fourth Proportional to 22,355.52, 30,862.80 and 15,661.68

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Solution

The fourth proportional to 22,355.52, 30,862.80 and 15,661.68 is: 21,621.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,355.52 : 30,862.80 = 15,661.68 : x
  2. Step 2: Convert to fraction form
    22,355.52/30,862.80 = 15,661.68/x
  3. Step 3: Cross multiply
    22,355.52x = 30,862.80 × 15,661.68
  4. Step 4: Simplify right side
    22,355.52x = 483,363,297.50
  5. Step 5: Solve for x
    x = 483,363,297.50/22,355.52
  6. Step 6: Final answer
    x = 21,621.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.