Home / 28,720.07-43,080.12-9,000.18

Finding the Fourth Proportional to 28,720.07, 43,080.12 and 9,000.18

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Solution

The fourth proportional to 28,720.07, 43,080.12 and 9,000.18 is: 13,500.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.07 : 43,080.12 = 9,000.18 : x
  2. Step 2: Convert to fraction form
    28,720.07/43,080.12 = 9,000.18/x
  3. Step 3: Cross multiply
    28,720.07x = 43,080.12 × 9,000.18
  4. Step 4: Simplify right side
    28,720.07x = 387,728,834.42
  5. Step 5: Solve for x
    x = 387,728,834.42/28,720.07
  6. Step 6: Final answer
    x = 13,500.28

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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.