Home / 28,118.62-42,136.30-12,309.04

Finding the Fourth Proportional to 28,118.62, 42,136.30 and 12,309.04

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Solution

The fourth proportional to 28,118.62, 42,136.30 and 12,309.04 is: 18,445.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,118.62 : 42,136.30 = 12,309.04 : x
  2. Step 2: Convert to fraction form
    28,118.62/42,136.30 = 12,309.04/x
  3. Step 3: Cross multiply
    28,118.62x = 42,136.30 × 12,309.04
  4. Step 4: Simplify right side
    28,118.62x = 518,657,402.15
  5. Step 5: Solve for x
    x = 518,657,402.15/28,118.62
  6. Step 6: Final answer
    x = 18,445.34

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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.