Home / 15,405.54-21,254.68-12,165.07

Finding the Fourth Proportional to 15,405.54, 21,254.68 and 12,165.07

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Solution

The fourth proportional to 15,405.54, 21,254.68 and 12,165.07 is: 16,783.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.54 : 21,254.68 = 12,165.07 : x
  2. Step 2: Convert to fraction form
    15,405.54/21,254.68 = 12,165.07/x
  3. Step 3: Cross multiply
    15,405.54x = 21,254.68 × 12,165.07
  4. Step 4: Simplify right side
    15,405.54x = 258,564,727.40
  5. Step 5: Solve for x
    x = 258,564,727.40/15,405.54
  6. Step 6: Final answer
    x = 16,783.88

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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.