Home / 12,421.28-18,631.74-3,061.40

Finding the Fourth Proportional to 12,421.28, 18,631.74 and 3,061.40

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Solution

The fourth proportional to 12,421.28, 18,631.74 and 3,061.40 is: 4,592.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.28 : 18,631.74 = 3,061.40 : x
  2. Step 2: Convert to fraction form
    12,421.28/18,631.74 = 3,061.40/x
  3. Step 3: Cross multiply
    12,421.28x = 18,631.74 × 3,061.40
  4. Step 4: Simplify right side
    12,421.28x = 57,039,208.84
  5. Step 5: Solve for x
    x = 57,039,208.84/12,421.28
  6. Step 6: Final answer
    x = 4,592.06

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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.