Home / 15,886.66-21,946.41-12,695.78

Finding the Fourth Proportional to 15,886.66, 21,946.41 and 12,695.78

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Solution

The fourth proportional to 15,886.66, 21,946.41 and 12,695.78 is: 17,538.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,886.66 : 21,946.41 = 12,695.78 : x
  2. Step 2: Convert to fraction form
    15,886.66/21,946.41 = 12,695.78/x
  3. Step 3: Cross multiply
    15,886.66x = 21,946.41 × 12,695.78
  4. Step 4: Simplify right side
    15,886.66x = 278,626,793.15
  5. Step 5: Solve for x
    x = 278,626,793.15/15,886.66
  6. Step 6: Final answer
    x = 17,538.41

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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.