Home / 15,220.62-21,003.03-8,931.78

Finding the Fourth Proportional to 15,220.62, 21,003.03 and 8,931.78

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Solution

The fourth proportional to 15,220.62, 21,003.03 and 8,931.78 is: 12,325.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220.62 : 21,003.03 = 8,931.78 : x
  2. Step 2: Convert to fraction form
    15,220.62/21,003.03 = 8,931.78/x
  3. Step 3: Cross multiply
    15,220.62x = 21,003.03 × 8,931.78
  4. Step 4: Simplify right side
    15,220.62x = 187,594,443.29
  5. Step 5: Solve for x
    x = 187,594,443.29/15,220.62
  6. Step 6: Final answer
    x = 12,325.02

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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.