Home / 15,720.04-21,693.78-8,646.52

Finding the Fourth Proportional to 15,720.04, 21,693.78 and 8,646.52

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Solution

The fourth proportional to 15,720.04, 21,693.78 and 8,646.52 is: 11,932.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720.04 : 21,693.78 = 8,646.52 : x
  2. Step 2: Convert to fraction form
    15,720.04/21,693.78 = 8,646.52/x
  3. Step 3: Cross multiply
    15,720.04x = 21,693.78 × 8,646.52
  4. Step 4: Simplify right side
    15,720.04x = 187,575,702.65
  5. Step 5: Solve for x
    x = 187,575,702.65/15,720.04
  6. Step 6: Final answer
    x = 11,932.27

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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.