Home / 47,995.20-71,992.80-12,938.40

Finding the Fourth Proportional to 47,995.20, 71,992.80 and 12,938.40

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Solution

The fourth proportional to 47,995.20, 71,992.80 and 12,938.40 is: 19,407.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,995.20 : 71,992.80 = 12,938.40 : x
  2. Step 2: Convert to fraction form
    47,995.20/71,992.80 = 12,938.40/x
  3. Step 3: Cross multiply
    47,995.20x = 71,992.80 × 12,938.40
  4. Step 4: Simplify right side
    47,995.20x = 931,471,643.52
  5. Step 5: Solve for x
    x = 931,471,643.52/47,995.20
  6. Step 6: Final answer
    x = 19,407.60

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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.