Home / 28,261.02-39,000.18-15,685.74

Finding the Fourth Proportional to 28,261.02, 39,000.18 and 15,685.74

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Solution

The fourth proportional to 28,261.02, 39,000.18 and 15,685.74 is: 21,646.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,261.02 : 39,000.18 = 15,685.74 : x
  2. Step 2: Convert to fraction form
    28,261.02/39,000.18 = 15,685.74/x
  3. Step 3: Cross multiply
    28,261.02x = 39,000.18 × 15,685.74
  4. Step 4: Simplify right side
    28,261.02x = 611,746,683.43
  5. Step 5: Solve for x
    x = 611,746,683.43/28,261.02
  6. Step 6: Final answer
    x = 21,646.31

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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.