Home / 31,079.12-42,889.16-16,931.96

Finding the Fourth Proportional to 31,079.12, 42,889.16 and 16,931.96

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Solution

The fourth proportional to 31,079.12, 42,889.16 and 16,931.96 is: 23,366.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,079.12 : 42,889.16 = 16,931.96 : x
  2. Step 2: Convert to fraction form
    31,079.12/42,889.16 = 16,931.96/x
  3. Step 3: Cross multiply
    31,079.12x = 42,889.16 × 16,931.96
  4. Step 4: Simplify right side
    31,079.12x = 726,197,541.55
  5. Step 5: Solve for x
    x = 726,197,541.55/31,079.12
  6. Step 6: Final answer
    x = 23,366.09

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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.