Home / 15,490.30-21,376.74-8,416.72

Finding the Fourth Proportional to 15,490.30, 21,376.74 and 8,416.72

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Solution

The fourth proportional to 15,490.30, 21,376.74 and 8,416.72 is: 11,615.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,490.30 : 21,376.74 = 8,416.72 : x
  2. Step 2: Convert to fraction form
    15,490.30/21,376.74 = 8,416.72/x
  3. Step 3: Cross multiply
    15,490.30x = 21,376.74 × 8,416.72
  4. Step 4: Simplify right side
    15,490.30x = 179,921,997.75
  5. Step 5: Solve for x
    x = 179,921,997.75/15,490.30
  6. Step 6: Final answer
    x = 11,615.14

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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.