Home / 23,138.80-31,931.49-12,528.43

Finding the Fourth Proportional to 23,138.80, 31,931.49 and 12,528.43

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Solution

The fourth proportional to 23,138.80, 31,931.49 and 12,528.43 is: 17,289.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,138.80 : 31,931.49 = 12,528.43 : x
  2. Step 2: Convert to fraction form
    23,138.80/31,931.49 = 12,528.43/x
  3. Step 3: Cross multiply
    23,138.80x = 31,931.49 × 12,528.43
  4. Step 4: Simplify right side
    23,138.80x = 400,051,437.26
  5. Step 5: Solve for x
    x = 400,051,437.26/23,138.80
  6. Step 6: Final answer
    x = 17,289.20

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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.