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Finding the Fourth Proportional to 15,694.68, 21,632.64 and 15,279.16

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Solution

The fourth proportional to 15,694.68, 21,632.64 and 15,279.16 is: 21,059.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,694.68 : 21,632.64 = 15,279.16 : x
  2. Step 2: Convert to fraction form
    15,694.68/21,632.64 = 15,279.16/x
  3. Step 3: Cross multiply
    15,694.68x = 21,632.64 × 15,279.16
  4. Step 4: Simplify right side
    15,694.68x = 330,528,567.78
  5. Step 5: Solve for x
    x = 330,528,567.78/15,694.68
  6. Step 6: Final answer
    x = 21,059.91

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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.