Home / 9,915.13-13,682.75-5,666.15

Finding the Fourth Proportional to 9,915.13, 13,682.75 and 5,666.15

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Solution

The fourth proportional to 9,915.13, 13,682.75 and 5,666.15 is: 7,819.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.13 : 13,682.75 = 5,666.15 : x
  2. Step 2: Convert to fraction form
    9,915.13/13,682.75 = 5,666.15/x
  3. Step 3: Cross multiply
    9,915.13x = 13,682.75 × 5,666.15
  4. Step 4: Simplify right side
    9,915.13x = 77,528,459.66
  5. Step 5: Solve for x
    x = 77,528,459.66/9,915.13
  6. Step 6: Final answer
    x = 7,819.21

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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.