Home / 20,239.90-30,365.80-10,386.06

Finding the Fourth Proportional to 20,239.90, 30,365.80 and 10,386.06

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Solution

The fourth proportional to 20,239.90, 30,365.80 and 10,386.06 is: 15,582.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,239.90 : 30,365.80 = 10,386.06 : x
  2. Step 2: Convert to fraction form
    20,239.90/30,365.80 = 10,386.06/x
  3. Step 3: Cross multiply
    20,239.90x = 30,365.80 × 10,386.06
  4. Step 4: Simplify right side
    20,239.90x = 315,381,020.75
  5. Step 5: Solve for x
    x = 315,381,020.75/20,239.90
  6. Step 6: Final answer
    x = 15,582.14

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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.