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Finding the Fourth Proportional to 22,985.80, 34,478.70 and 20,480.20

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Solution

The fourth proportional to 22,985.80, 34,478.70 and 20,480.20 is: 30,720.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,985.80 : 34,478.70 = 20,480.20 : x
  2. Step 2: Convert to fraction form
    22,985.80/34,478.70 = 20,480.20/x
  3. Step 3: Cross multiply
    22,985.80x = 34,478.70 × 20,480.20
  4. Step 4: Simplify right side
    22,985.80x = 706,130,671.74
  5. Step 5: Solve for x
    x = 706,130,671.74/22,985.80
  6. Step 6: Final answer
    x = 30,720.30

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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.