Home / 23,139.06-31,931.78-12,528.66

Finding the Fourth Proportional to 23,139.06, 31,931.78 and 12,528.66

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Solution

The fourth proportional to 23,139.06, 31,931.78 and 12,528.66 is: 17,289.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,139.06 : 31,931.78 = 12,528.66 : x
  2. Step 2: Convert to fraction form
    23,139.06/31,931.78 = 12,528.66/x
  3. Step 3: Cross multiply
    23,139.06x = 31,931.78 × 12,528.66
  4. Step 4: Simplify right side
    23,139.06x = 400,062,414.81
  5. Step 5: Solve for x
    x = 400,062,414.81/23,139.06
  6. Step 6: Final answer
    x = 17,289.48

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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.