Home / 15,886.16-21,945.72-12,695.28

Finding the Fourth Proportional to 15,886.16, 21,945.72 and 12,695.28

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Solution

The fourth proportional to 15,886.16, 21,945.72 and 12,695.28 is: 17,537.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,886.16 : 21,945.72 = 12,695.28 : x
  2. Step 2: Convert to fraction form
    15,886.16/21,945.72 = 12,695.28/x
  3. Step 3: Cross multiply
    15,886.16x = 21,945.72 × 12,695.28
  4. Step 4: Simplify right side
    15,886.16x = 278,607,060.20
  5. Step 5: Solve for x
    x = 278,607,060.20/15,886.16
  6. Step 6: Final answer
    x = 17,537.73

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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.