Home / 28,186.47-42,275.13-8,461.55

Finding the Fourth Proportional to 28,186.47, 42,275.13 and 8,461.55

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Solution

The fourth proportional to 28,186.47, 42,275.13 and 8,461.55 is: 12,690.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,186.47 : 42,275.13 = 8,461.55 : x
  2. Step 2: Convert to fraction form
    28,186.47/42,275.13 = 8,461.55/x
  3. Step 3: Cross multiply
    28,186.47x = 42,275.13 × 8,461.55
  4. Step 4: Simplify right side
    28,186.47x = 357,713,126.25
  5. Step 5: Solve for x
    x = 357,713,126.25/28,186.47
  6. Step 6: Final answer
    x = 12,690.95

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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.