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Finding the Fourth Proportional to 15,719.66, 21,693.58 and 8,646.54

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Solution

The fourth proportional to 15,719.66, 21,693.58 and 8,646.54 is: 11,932.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,719.66 : 21,693.58 = 8,646.54 : x
  2. Step 2: Convert to fraction form
    15,719.66/21,693.58 = 8,646.54/x
  3. Step 3: Cross multiply
    15,719.66x = 21,693.58 × 8,646.54
  4. Step 4: Simplify right side
    15,719.66x = 187,574,407.21
  5. Step 5: Solve for x
    x = 187,574,407.21/15,719.66
  6. Step 6: Final answer
    x = 11,932.47

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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.