Home / 21,731.00-29,985.36-12,657.86

Finding the Fourth Proportional to 21,731.00, 29,985.36 and 12,657.86

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Solution

The fourth proportional to 21,731.00, 29,985.36 and 12,657.86 is: 17,465.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,731.00 : 29,985.36 = 12,657.86 : x
  2. Step 2: Convert to fraction form
    21,731.00/29,985.36 = 12,657.86/x
  3. Step 3: Cross multiply
    21,731.00x = 29,985.36 × 12,657.86
  4. Step 4: Simplify right side
    21,731.00x = 379,550,275.71
  5. Step 5: Solve for x
    x = 379,550,275.71/21,731.00
  6. Step 6: Final answer
    x = 17,465.84

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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.