Home / 20,484.90-30,715.20-10,643.40

Finding the Fourth Proportional to 20,484.90, 30,715.20 and 10,643.40

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Solution

The fourth proportional to 20,484.90, 30,715.20 and 10,643.40 is: 15,958.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,484.90 : 30,715.20 = 10,643.40 : x
  2. Step 2: Convert to fraction form
    20,484.90/30,715.20 = 10,643.40/x
  3. Step 3: Cross multiply
    20,484.90x = 30,715.20 × 10,643.40
  4. Step 4: Simplify right side
    20,484.90x = 326,914,159.68
  5. Step 5: Solve for x
    x = 326,914,159.68/20,484.90
  6. Step 6: Final answer
    x = 15,958.79

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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.