Home / 20,430.95-30,629.42-7,948.04

Finding the Fourth Proportional to 20,430.95, 30,629.42 and 7,948.04

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Solution

The fourth proportional to 20,430.95, 30,629.42 and 7,948.04 is: 11,915.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.95 : 30,629.42 = 7,948.04 : x
  2. Step 2: Convert to fraction form
    20,430.95/30,629.42 = 7,948.04/x
  3. Step 3: Cross multiply
    20,430.95x = 30,629.42 × 7,948.04
  4. Step 4: Simplify right side
    20,430.95x = 243,443,815.60
  5. Step 5: Solve for x
    x = 243,443,815.60/20,430.95
  6. Step 6: Final answer
    x = 11,915.44

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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.