Home / 28,001.80-42,002.70-8,280.55

Finding the Fourth Proportional to 28,001.80, 42,002.70 and 8,280.55

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Solution

The fourth proportional to 28,001.80, 42,002.70 and 8,280.55 is: 12,420.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,001.80 : 42,002.70 = 8,280.55 : x
  2. Step 2: Convert to fraction form
    28,001.80/42,002.70 = 8,280.55/x
  3. Step 3: Cross multiply
    28,001.80x = 42,002.70 × 8,280.55
  4. Step 4: Simplify right side
    28,001.80x = 347,805,457.49
  5. Step 5: Solve for x
    x = 347,805,457.49/28,001.80
  6. Step 6: Final answer
    x = 12,420.83

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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.