Home / 21,117.42-31,676.12-9,718.19

Finding the Fourth Proportional to 21,117.42, 31,676.12 and 9,718.19

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Solution

The fourth proportional to 21,117.42, 31,676.12 and 9,718.19 is: 14,577.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.42 : 31,676.12 = 9,718.19 : x
  2. Step 2: Convert to fraction form
    21,117.42/31,676.12 = 9,718.19/x
  3. Step 3: Cross multiply
    21,117.42x = 31,676.12 × 9,718.19
  4. Step 4: Simplify right side
    21,117.42x = 307,834,656.11
  5. Step 5: Solve for x
    x = 307,834,656.11/21,117.42
  6. Step 6: Final answer
    x = 14,577.29

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.