Home / 15,134.40-20,883.06-8,420.00

Finding the Fourth Proportional to 15,134.40, 20,883.06 and 8,420.00

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Solution

The fourth proportional to 15,134.40, 20,883.06 and 8,420.00 is: 11,618.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,134.40 : 20,883.06 = 8,420.00 : x
  2. Step 2: Convert to fraction form
    15,134.40/20,883.06 = 8,420.00/x
  3. Step 3: Cross multiply
    15,134.40x = 20,883.06 × 8,420.00
  4. Step 4: Simplify right side
    15,134.40x = 175,835,260.78
  5. Step 5: Solve for x
    x = 175,835,260.78/15,134.40
  6. Step 6: Final answer
    x = 11,618.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.