Home / 15,656.98-21,600.64-9,991.95

Finding the Fourth Proportional to 15,656.98, 21,600.64 and 9,991.95

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Solution

The fourth proportional to 15,656.98, 21,600.64 and 9,991.95 is: 13,785.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,656.98 : 21,600.64 = 9,991.95 : x
  2. Step 2: Convert to fraction form
    15,656.98/21,600.64 = 9,991.95/x
  3. Step 3: Cross multiply
    15,656.98x = 21,600.64 × 9,991.95
  4. Step 4: Simplify right side
    15,656.98x = 215,832,514.85
  5. Step 5: Solve for x
    x = 215,832,514.85/15,656.98
  6. Step 6: Final answer
    x = 13,785.07

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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.