Home / 30,246.80-45,370.20-20,915.60

Finding the Fourth Proportional to 30,246.80, 45,370.20 and 20,915.60

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Solution

The fourth proportional to 30,246.80, 45,370.20 and 20,915.60 is: 31,373.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,246.80 : 45,370.20 = 20,915.60 : x
  2. Step 2: Convert to fraction form
    30,246.80/45,370.20 = 20,915.60/x
  3. Step 3: Cross multiply
    30,246.80x = 45,370.20 × 20,915.60
  4. Step 4: Simplify right side
    30,246.80x = 948,944,955.12
  5. Step 5: Solve for x
    x = 948,944,955.12/30,246.80
  6. Step 6: Final answer
    x = 31,373.40

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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.