Home / 15,563.85-21,478.20-8,490.33

Finding the Fourth Proportional to 15,563.85, 21,478.20 and 8,490.33

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Solution

The fourth proportional to 15,563.85, 21,478.20 and 8,490.33 is: 11,716.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,563.85 : 21,478.20 = 8,490.33 : x
  2. Step 2: Convert to fraction form
    15,563.85/21,478.20 = 8,490.33/x
  3. Step 3: Cross multiply
    15,563.85x = 21,478.20 × 8,490.33
  4. Step 4: Simplify right side
    15,563.85x = 182,357,005.81
  5. Step 5: Solve for x
    x = 182,357,005.81/15,563.85
  6. Step 6: Final answer
    x = 11,716.70

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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.