Home / 28,612.47-39,468.02-20,672.31

Finding the Fourth Proportional to 28,612.47, 39,468.02 and 20,672.31

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Solution

The fourth proportional to 28,612.47, 39,468.02 and 20,672.31 is: 28,515.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,612.47 : 39,468.02 = 20,672.31 : x
  2. Step 2: Convert to fraction form
    28,612.47/39,468.02 = 20,672.31/x
  3. Step 3: Cross multiply
    28,612.47x = 39,468.02 × 20,672.31
  4. Step 4: Simplify right side
    28,612.47x = 815,895,041.16
  5. Step 5: Solve for x
    x = 815,895,041.16/28,612.47
  6. Step 6: Final answer
    x = 28,515.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.