Home / 21,157.61-31,757.06-10,071.95

Finding the Fourth Proportional to 21,157.61, 31,757.06 and 10,071.95

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Solution

The fourth proportional to 21,157.61, 31,757.06 and 10,071.95 is: 15,117.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.61 : 31,757.06 = 10,071.95 : x
  2. Step 2: Convert to fraction form
    21,157.61/31,757.06 = 10,071.95/x
  3. Step 3: Cross multiply
    21,157.61x = 31,757.06 × 10,071.95
  4. Step 4: Simplify right side
    21,157.61x = 319,855,386.86
  5. Step 5: Solve for x
    x = 319,855,386.86/21,157.61
  6. Step 6: Final answer
    x = 15,117.75

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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.