Home / 13,680.47-18,876.98-7,712.04

Finding the Fourth Proportional to 13,680.47, 18,876.98 and 7,712.04

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Solution

The fourth proportional to 13,680.47, 18,876.98 and 7,712.04 is: 10,641.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.47 : 18,876.98 = 7,712.04 : x
  2. Step 2: Convert to fraction form
    13,680.47/18,876.98 = 7,712.04/x
  3. Step 3: Cross multiply
    13,680.47x = 18,876.98 × 7,712.04
  4. Step 4: Simplify right side
    13,680.47x = 145,579,986.28
  5. Step 5: Solve for x
    x = 145,579,986.28/13,680.47
  6. Step 6: Final answer
    x = 10,641.45

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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.