Home / 20,798.40-31,186.18-10,245.20

Finding the Fourth Proportional to 20,798.40, 31,186.18 and 10,245.20

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Solution

The fourth proportional to 20,798.40, 31,186.18 and 10,245.20 is: 15,362.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,798.40 : 31,186.18 = 10,245.20 : x
  2. Step 2: Convert to fraction form
    20,798.40/31,186.18 = 10,245.20/x
  3. Step 3: Cross multiply
    20,798.40x = 31,186.18 × 10,245.20
  4. Step 4: Simplify right side
    20,798.40x = 319,508,600.11
  5. Step 5: Solve for x
    x = 319,508,600.11/20,798.40
  6. Step 6: Final answer
    x = 15,362.17

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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.