Home / 20,117.32-30,330.33-18,762.12

Finding the Fourth Proportional to 20,117.32, 30,330.33 and 18,762.12

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Solution

The fourth proportional to 20,117.32, 30,330.33 and 18,762.12 is: 28,287.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,117.32 : 30,330.33 = 18,762.12 : x
  2. Step 2: Convert to fraction form
    20,117.32/30,330.33 = 18,762.12/x
  3. Step 3: Cross multiply
    20,117.32x = 30,330.33 × 18,762.12
  4. Step 4: Simplify right side
    20,117.32x = 569,061,291.10
  5. Step 5: Solve for x
    x = 569,061,291.10/20,117.32
  6. Step 6: Final answer
    x = 28,287.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.