Home / 20,261.36-30,402.71-10,400.65

Finding the Fourth Proportional to 20,261.36, 30,402.71 and 10,400.65

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Solution

The fourth proportional to 20,261.36, 30,402.71 and 10,400.65 is: 15,606.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,261.36 : 30,402.71 = 10,400.65 : x
  2. Step 2: Convert to fraction form
    20,261.36/30,402.71 = 10,400.65/x
  3. Step 3: Cross multiply
    20,261.36x = 30,402.71 × 10,400.65
  4. Step 4: Simplify right side
    20,261.36x = 316,207,945.76
  5. Step 5: Solve for x
    x = 316,207,945.76/20,261.36
  6. Step 6: Final answer
    x = 15,606.45

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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.