Home / 15,693.31-21,657.14-8,979.57

Finding the Fourth Proportional to 15,693.31, 21,657.14 and 8,979.57

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Solution

The fourth proportional to 15,693.31, 21,657.14 and 8,979.57 is: 12,392.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,693.31 : 21,657.14 = 8,979.57 : x
  2. Step 2: Convert to fraction form
    15,693.31/21,657.14 = 8,979.57/x
  3. Step 3: Cross multiply
    15,693.31x = 21,657.14 × 8,979.57
  4. Step 4: Simplify right side
    15,693.31x = 194,471,804.63
  5. Step 5: Solve for x
    x = 194,471,804.63/15,693.31
  6. Step 6: Final answer
    x = 12,392.02

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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.