Home / 28,720.90-43,082.70-9,000.10

Finding the Fourth Proportional to 28,720.90, 43,082.70 and 9,000.10

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Solution

The fourth proportional to 28,720.90, 43,082.70 and 9,000.10 is: 13,500.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.90 : 43,082.70 = 9,000.10 : x
  2. Step 2: Convert to fraction form
    28,720.90/43,082.70 = 9,000.10/x
  3. Step 3: Cross multiply
    28,720.90x = 43,082.70 × 9,000.10
  4. Step 4: Simplify right side
    28,720.90x = 387,748,608.27
  5. Step 5: Solve for x
    x = 387,748,608.27/28,720.90
  6. Step 6: Final answer
    x = 13,500.57

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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.