Home / 15,564.94-21,478.50-8,491.20

Finding the Fourth Proportional to 15,564.94, 21,478.50 and 8,491.20

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Solution

The fourth proportional to 15,564.94, 21,478.50 and 8,491.20 is: 11,717.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.94 : 21,478.50 = 8,491.20 : x
  2. Step 2: Convert to fraction form
    15,564.94/21,478.50 = 8,491.20/x
  3. Step 3: Cross multiply
    15,564.94x = 21,478.50 × 8,491.20
  4. Step 4: Simplify right side
    15,564.94x = 182,378,239.20
  5. Step 5: Solve for x
    x = 182,378,239.20/15,564.94
  6. Step 6: Final answer
    x = 11,717.25

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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.