Home / 12,947.20-19,430.40-8,563.20

Finding the Fourth Proportional to 12,947.20, 19,430.40 and 8,563.20

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Solution

The fourth proportional to 12,947.20, 19,430.40 and 8,563.20 is: 12,851.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,947.20 : 19,430.40 = 8,563.20 : x
  2. Step 2: Convert to fraction form
    12,947.20/19,430.40 = 8,563.20/x
  3. Step 3: Cross multiply
    12,947.20x = 19,430.40 × 8,563.20
  4. Step 4: Simplify right side
    12,947.20x = 166,386,401.28
  5. Step 5: Solve for x
    x = 166,386,401.28/12,947.20
  6. Step 6: Final answer
    x = 12,851.15

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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.