Home / 9,915.12-13,683.05-5,439.10

Finding the Fourth Proportional to 9,915.12, 13,683.05 and 5,439.10

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Solution

The fourth proportional to 9,915.12, 13,683.05 and 5,439.10 is: 7,506.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.12 : 13,683.05 = 5,439.10 : x
  2. Step 2: Convert to fraction form
    9,915.12/13,683.05 = 5,439.10/x
  3. Step 3: Cross multiply
    9,915.12x = 13,683.05 × 5,439.10
  4. Step 4: Simplify right side
    9,915.12x = 74,423,463.66
  5. Step 5: Solve for x
    x = 74,423,463.66/9,915.12
  6. Step 6: Final answer
    x = 7,506.06

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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.