Home / 20,148.64-30,142.32-17,931.68

Finding the Fourth Proportional to 20,148.64, 30,142.32 and 17,931.68

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Solution

The fourth proportional to 20,148.64, 30,142.32 and 17,931.68 is: 26,825.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,148.64 : 30,142.32 = 17,931.68 : x
  2. Step 2: Convert to fraction form
    20,148.64/30,142.32 = 17,931.68/x
  3. Step 3: Cross multiply
    20,148.64x = 30,142.32 × 17,931.68
  4. Step 4: Simplify right side
    20,148.64x = 540,502,436.70
  5. Step 5: Solve for x
    x = 540,502,436.70/20,148.64
  6. Step 6: Final answer
    x = 26,825.75

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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.