Home / 21,931.80-30,260.16-12,498.54

Finding the Fourth Proportional to 21,931.80, 30,260.16 and 12,498.54

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Solution

The fourth proportional to 21,931.80, 30,260.16 and 12,498.54 is: 17,244.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.80 : 30,260.16 = 12,498.54 : x
  2. Step 2: Convert to fraction form
    21,931.80/30,260.16 = 12,498.54/x
  3. Step 3: Cross multiply
    21,931.80x = 30,260.16 × 12,498.54
  4. Step 4: Simplify right side
    21,931.80x = 378,207,820.17
  5. Step 5: Solve for x
    x = 378,207,820.17/21,931.80
  6. Step 6: Final answer
    x = 17,244.72

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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.