Home / 10,815.40-16,223.10-7,316.20

Finding the Fourth Proportional to 10,815.40, 16,223.10 and 7,316.20

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Solution

The fourth proportional to 10,815.40, 16,223.10 and 7,316.20 is: 10,974.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,815.40 : 16,223.10 = 7,316.20 : x
  2. Step 2: Convert to fraction form
    10,815.40/16,223.10 = 7,316.20/x
  3. Step 3: Cross multiply
    10,815.40x = 16,223.10 × 7,316.20
  4. Step 4: Simplify right side
    10,815.40x = 118,691,444.22
  5. Step 5: Solve for x
    x = 118,691,444.22/10,815.40
  6. Step 6: Final answer
    x = 10,974.30

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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.