Home / 15,388.31-21,230.57-9,340.46

Finding the Fourth Proportional to 15,388.31, 21,230.57 and 9,340.46

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Solution

The fourth proportional to 15,388.31, 21,230.57 and 9,340.46 is: 12,886.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,388.31 : 21,230.57 = 9,340.46 : x
  2. Step 2: Convert to fraction form
    15,388.31/21,230.57 = 9,340.46/x
  3. Step 3: Cross multiply
    15,388.31x = 21,230.57 × 9,340.46
  4. Step 4: Simplify right side
    15,388.31x = 198,303,296.24
  5. Step 5: Solve for x
    x = 198,303,296.24/15,388.31
  6. Step 6: Final answer
    x = 12,886.62

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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.