Home / 15,564.60-21,479.45-8,491.01

Finding the Fourth Proportional to 15,564.60, 21,479.45 and 8,491.01

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Solution

The fourth proportional to 15,564.60, 21,479.45 and 8,491.01 is: 11,717.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.60 : 21,479.45 = 8,491.01 : x
  2. Step 2: Convert to fraction form
    15,564.60/21,479.45 = 8,491.01/x
  3. Step 3: Cross multiply
    15,564.60x = 21,479.45 × 8,491.01
  4. Step 4: Simplify right side
    15,564.60x = 182,382,074.89
  5. Step 5: Solve for x
    x = 182,382,074.89/15,564.60
  6. Step 6: Final answer
    x = 11,717.75

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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.