Home / 23,138.50-31,931.14-12,528.12

Finding the Fourth Proportional to 23,138.50, 31,931.14 and 12,528.12

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Solution

The fourth proportional to 23,138.50, 31,931.14 and 12,528.12 is: 17,288.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,138.50 : 31,931.14 = 12,528.12 : x
  2. Step 2: Convert to fraction form
    23,138.50/31,931.14 = 12,528.12/x
  3. Step 3: Cross multiply
    23,138.50x = 31,931.14 × 12,528.12
  4. Step 4: Simplify right side
    23,138.50x = 400,037,153.66
  5. Step 5: Solve for x
    x = 400,037,153.66/23,138.50
  6. Step 6: Final answer
    x = 17,288.81

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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.