Home / 10,904.72-15,045.90-6,428.12

Finding the Fourth Proportional to 10,904.72, 15,045.90 and 6,428.12

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Solution

The fourth proportional to 10,904.72, 15,045.90 and 6,428.12 is: 8,869.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,904.72 : 15,045.90 = 6,428.12 : x
  2. Step 2: Convert to fraction form
    10,904.72/15,045.90 = 6,428.12/x
  3. Step 3: Cross multiply
    10,904.72x = 15,045.90 × 6,428.12
  4. Step 4: Simplify right side
    10,904.72x = 96,716,850.71
  5. Step 5: Solve for x
    x = 96,716,850.71/10,904.72
  6. Step 6: Final answer
    x = 8,869.26

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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.