Home / 10,426.60-15,643.10-8,236.20

Finding the Fourth Proportional to 10,426.60, 15,643.10 and 8,236.20

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Solution

The fourth proportional to 10,426.60, 15,643.10 and 8,236.20 is: 12,356.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,426.60 : 15,643.10 = 8,236.20 : x
  2. Step 2: Convert to fraction form
    10,426.60/15,643.10 = 8,236.20/x
  3. Step 3: Cross multiply
    10,426.60x = 15,643.10 × 8,236.20
  4. Step 4: Simplify right side
    10,426.60x = 128,839,700.22
  5. Step 5: Solve for x
    x = 128,839,700.22/10,426.60
  6. Step 6: Final answer
    x = 12,356.83

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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.