Home / 18,885.40-28,326.42-6,405.13

Finding the Fourth Proportional to 18,885.40, 28,326.42 and 6,405.13

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Solution

The fourth proportional to 18,885.40, 28,326.42 and 6,405.13 is: 9,607.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885.40 : 28,326.42 = 6,405.13 : x
  2. Step 2: Convert to fraction form
    18,885.40/28,326.42 = 6,405.13/x
  3. Step 3: Cross multiply
    18,885.40x = 28,326.42 × 6,405.13
  4. Step 4: Simplify right side
    18,885.40x = 181,434,402.53
  5. Step 5: Solve for x
    x = 181,434,402.53/18,885.40
  6. Step 6: Final answer
    x = 9,607.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.