Home / 15,478.73-21,360.46-8,405.20

Finding the Fourth Proportional to 15,478.73, 21,360.46 and 8,405.20

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Solution

The fourth proportional to 15,478.73, 21,360.46 and 8,405.20 is: 11,599.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.73 : 21,360.46 = 8,405.20 : x
  2. Step 2: Convert to fraction form
    15,478.73/21,360.46 = 8,405.20/x
  3. Step 3: Cross multiply
    15,478.73x = 21,360.46 × 8,405.20
  4. Step 4: Simplify right side
    15,478.73x = 179,538,959.84
  5. Step 5: Solve for x
    x = 179,538,959.84/15,478.73
  6. Step 6: Final answer
    x = 11,599.08

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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.