Home / 28,225.64-42,349.80-12,654.20

Finding the Fourth Proportional to 28,225.64, 42,349.80 and 12,654.20

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Solution

The fourth proportional to 28,225.64, 42,349.80 and 12,654.20 is: 18,986.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,225.64 : 42,349.80 = 12,654.20 : x
  2. Step 2: Convert to fraction form
    28,225.64/42,349.80 = 12,654.20/x
  3. Step 3: Cross multiply
    28,225.64x = 42,349.80 × 12,654.20
  4. Step 4: Simplify right side
    28,225.64x = 535,902,839.16
  5. Step 5: Solve for x
    x = 535,902,839.16/28,225.64
  6. Step 6: Final answer
    x = 18,986.38

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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.