Home / 28,657.36-42,988.16-12,000.64

Finding the Fourth Proportional to 28,657.36, 42,988.16 and 12,000.64

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Solution

The fourth proportional to 28,657.36, 42,988.16 and 12,000.64 is: 18,001.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,657.36 : 42,988.16 = 12,000.64 : x
  2. Step 2: Convert to fraction form
    28,657.36/42,988.16 = 12,000.64/x
  3. Step 3: Cross multiply
    28,657.36x = 42,988.16 × 12,000.64
  4. Step 4: Simplify right side
    28,657.36x = 515,885,432.42
  5. Step 5: Solve for x
    x = 515,885,432.42/28,657.36
  6. Step 6: Final answer
    x = 18,001.85

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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.