Home / 9,871.47-13,623.80-5,680.53

Finding the Fourth Proportional to 9,871.47, 13,623.80 and 5,680.53

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Solution

The fourth proportional to 9,871.47, 13,623.80 and 5,680.53 is: 7,839.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,871.47 : 13,623.80 = 5,680.53 : x
  2. Step 2: Convert to fraction form
    9,871.47/13,623.80 = 5,680.53/x
  3. Step 3: Cross multiply
    9,871.47x = 13,623.80 × 5,680.53
  4. Step 4: Simplify right side
    9,871.47x = 77,390,376.21
  5. Step 5: Solve for x
    x = 77,390,376.21/9,871.47
  6. Step 6: Final answer
    x = 7,839.80

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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.