Home / 10,581.40-15,857.70-7,499.80

Finding the Fourth Proportional to 10,581.40, 15,857.70 and 7,499.80

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Solution

The fourth proportional to 10,581.40, 15,857.70 and 7,499.80 is: 11,239.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,581.40 : 15,857.70 = 7,499.80 : x
  2. Step 2: Convert to fraction form
    10,581.40/15,857.70 = 7,499.80/x
  3. Step 3: Cross multiply
    10,581.40x = 15,857.70 × 7,499.80
  4. Step 4: Simplify right side
    10,581.40x = 118,929,578.46
  5. Step 5: Solve for x
    x = 118,929,578.46/10,581.40
  6. Step 6: Final answer
    x = 11,239.49

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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.