Home / 15,478.91-21,360.90-8,405.33

Finding the Fourth Proportional to 15,478.91, 21,360.90 and 8,405.33

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Solution

The fourth proportional to 15,478.91, 21,360.90 and 8,405.33 is: 11,599.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.91 : 21,360.90 = 8,405.33 : x
  2. Step 2: Convert to fraction form
    15,478.91/21,360.90 = 8,405.33/x
  3. Step 3: Cross multiply
    15,478.91x = 21,360.90 × 8,405.33
  4. Step 4: Simplify right side
    15,478.91x = 179,545,423.50
  5. Step 5: Solve for x
    x = 179,545,423.50/15,478.91
  6. Step 6: Final answer
    x = 11,599.36

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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.