Home / 10,287.21-15,428.12-3,712.17

Finding the Fourth Proportional to 10,287.21, 15,428.12 and 3,712.17

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Solution

The fourth proportional to 10,287.21, 15,428.12 and 3,712.17 is: 5,567.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,287.21 : 15,428.12 = 3,712.17 : x
  2. Step 2: Convert to fraction form
    10,287.21/15,428.12 = 3,712.17/x
  3. Step 3: Cross multiply
    10,287.21x = 15,428.12 × 3,712.17
  4. Step 4: Simplify right side
    10,287.21x = 57,271,785.66
  5. Step 5: Solve for x
    x = 57,271,785.66/10,287.21
  6. Step 6: Final answer
    x = 5,567.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.