Home / 9,915.39-13,675.35-8,428.23

Finding the Fourth Proportional to 9,915.39, 13,675.35 and 8,428.23

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Solution

The fourth proportional to 9,915.39, 13,675.35 and 8,428.23 is: 11,624.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.39 : 13,675.35 = 8,428.23 : x
  2. Step 2: Convert to fraction form
    9,915.39/13,675.35 = 8,428.23/x
  3. Step 3: Cross multiply
    9,915.39x = 13,675.35 × 8,428.23
  4. Step 4: Simplify right side
    9,915.39x = 115,258,995.13
  5. Step 5: Solve for x
    x = 115,258,995.13/9,915.39
  6. Step 6: Final answer
    x = 11,624.25

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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.