Home / 20,607.90-28,440.80-12,952.42

Finding the Fourth Proportional to 20,607.90, 28,440.80 and 12,952.42

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Solution

The fourth proportional to 20,607.90, 28,440.80 and 12,952.42 is: 17,875.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,607.90 : 28,440.80 = 12,952.42 : x
  2. Step 2: Convert to fraction form
    20,607.90/28,440.80 = 12,952.42/x
  3. Step 3: Cross multiply
    20,607.90x = 28,440.80 × 12,952.42
  4. Step 4: Simplify right side
    20,607.90x = 368,377,157.52
  5. Step 5: Solve for x
    x = 368,377,157.52/20,607.90
  6. Step 6: Final answer
    x = 17,875.53

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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.