Home / 9,218-12,721.80-5,681.12

Finding the Fourth Proportional to 9,218, 12,721.80 and 5,681.12

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Solution

The fourth proportional to 9,218, 12,721.80 and 5,681.12 is: 7,840.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,218 : 12,721.80 = 5,681.12 : x
  2. Step 2: Convert to fraction form
    9,218/12,721.80 = 5,681.12/x
  3. Step 3: Cross multiply
    9,218x = 12,721.80 × 5,681.12
  4. Step 4: Simplify right side
    9,218x = 72,274,072.42
  5. Step 5: Solve for x
    x = 72,274,072.42/9,218
  6. Step 6: Final answer
    x = 7,840.54

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Half scale
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Double scale
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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.