Home / 20,663.70-31,003.65-7,517.40

Finding the Fourth Proportional to 20,663.70, 31,003.65 and 7,517.40

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Solution

The fourth proportional to 20,663.70, 31,003.65 and 7,517.40 is: 11,279.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.70 : 31,003.65 = 7,517.40 : x
  2. Step 2: Convert to fraction form
    20,663.70/31,003.65 = 7,517.40/x
  3. Step 3: Cross multiply
    20,663.70x = 31,003.65 × 7,517.40
  4. Step 4: Simplify right side
    20,663.70x = 233,066,838.51
  5. Step 5: Solve for x
    x = 233,066,838.51/20,663.70
  6. Step 6: Final answer
    x = 11,279.05

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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.