Home / 23,138.90-31,931.69-12,528.54

Finding the Fourth Proportional to 23,138.90, 31,931.69 and 12,528.54

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Solution

The fourth proportional to 23,138.90, 31,931.69 and 12,528.54 is: 17,289.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,138.90 : 31,931.69 = 12,528.54 : x
  2. Step 2: Convert to fraction form
    23,138.90/31,931.69 = 12,528.54/x
  3. Step 3: Cross multiply
    23,138.90x = 31,931.69 × 12,528.54
  4. Step 4: Simplify right side
    23,138.90x = 400,057,392.79
  5. Step 5: Solve for x
    x = 400,057,392.79/23,138.90
  6. Step 6: Final answer
    x = 17,289.39

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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.