Home / 12,421.40-18,632.10-4,102.70

Finding the Fourth Proportional to 12,421.40, 18,632.10 and 4,102.70

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Solution

The fourth proportional to 12,421.40, 18,632.10 and 4,102.70 is: 6,154.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.40 : 18,632.10 = 4,102.70 : x
  2. Step 2: Convert to fraction form
    12,421.40/18,632.10 = 4,102.70/x
  3. Step 3: Cross multiply
    12,421.40x = 18,632.10 × 4,102.70
  4. Step 4: Simplify right side
    12,421.40x = 76,441,916.67
  5. Step 5: Solve for x
    x = 76,441,916.67/12,421.40
  6. Step 6: Final answer
    x = 6,154.05

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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.