Home / 21,072.18-31,616.76-9,377.40

Finding the Fourth Proportional to 21,072.18, 31,616.76 and 9,377.40

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Solution

The fourth proportional to 21,072.18, 31,616.76 and 9,377.40 is: 14,069.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.18 : 31,616.76 = 9,377.40 : x
  2. Step 2: Convert to fraction form
    21,072.18/31,616.76 = 9,377.40/x
  3. Step 3: Cross multiply
    21,072.18x = 31,616.76 × 9,377.40
  4. Step 4: Simplify right side
    21,072.18x = 296,483,005.22
  5. Step 5: Solve for x
    x = 296,483,005.22/21,072.18
  6. Step 6: Final answer
    x = 14,069.88

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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.