Home / 28,720.31-43,080.48-9,000.40

Finding the Fourth Proportional to 28,720.31, 43,080.48 and 9,000.40

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Solution

The fourth proportional to 28,720.31, 43,080.48 and 9,000.40 is: 13,500.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.31 : 43,080.48 = 9,000.40 : x
  2. Step 2: Convert to fraction form
    28,720.31/43,080.48 = 9,000.40/x
  3. Step 3: Cross multiply
    28,720.31x = 43,080.48 × 9,000.40
  4. Step 4: Simplify right side
    28,720.31x = 387,741,552.19
  5. Step 5: Solve for x
    x = 387,741,552.19/28,720.31
  6. Step 6: Final answer
    x = 13,500.60

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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.