Home / 11,490.30-15,856.20-7,021.56

Finding the Fourth Proportional to 11,490.30, 15,856.20 and 7,021.56

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Solution

The fourth proportional to 11,490.30, 15,856.20 and 7,021.56 is: 9,689.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,490.30 : 15,856.20 = 7,021.56 : x
  2. Step 2: Convert to fraction form
    11,490.30/15,856.20 = 7,021.56/x
  3. Step 3: Cross multiply
    11,490.30x = 15,856.20 × 7,021.56
  4. Step 4: Simplify right side
    11,490.30x = 111,335,259.67
  5. Step 5: Solve for x
    x = 111,335,259.67/11,490.30
  6. Step 6: Final answer
    x = 9,689.50

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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.