Home / 15,421.47-21,270.60-9,680.59

Finding the Fourth Proportional to 15,421.47, 21,270.60 and 9,680.59

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Solution

The fourth proportional to 15,421.47, 21,270.60 and 9,680.59 is: 13,352.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421.47 : 21,270.60 = 9,680.59 : x
  2. Step 2: Convert to fraction form
    15,421.47/21,270.60 = 9,680.59/x
  3. Step 3: Cross multiply
    15,421.47x = 21,270.60 × 9,680.59
  4. Step 4: Simplify right side
    15,421.47x = 205,911,957.65
  5. Step 5: Solve for x
    x = 205,911,957.65/15,421.47
  6. Step 6: Final answer
    x = 13,352.29

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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.