Home / 20,242.90-30,370.30-10,389.06

Finding the Fourth Proportional to 20,242.90, 30,370.30 and 10,389.06

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Solution

The fourth proportional to 20,242.90, 30,370.30 and 10,389.06 is: 15,586.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,242.90 : 30,370.30 = 10,389.06 : x
  2. Step 2: Convert to fraction form
    20,242.90/30,370.30 = 10,389.06/x
  3. Step 3: Cross multiply
    20,242.90x = 30,370.30 × 10,389.06
  4. Step 4: Simplify right side
    20,242.90x = 315,518,868.92
  5. Step 5: Solve for x
    x = 315,518,868.92/20,242.90
  6. Step 6: Final answer
    x = 15,586.64

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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.