Home / 10,219.20-15,328.80-9,614.40

Finding the Fourth Proportional to 10,219.20, 15,328.80 and 9,614.40

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Solution

The fourth proportional to 10,219.20, 15,328.80 and 9,614.40 is: 14,421.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,219.20 : 15,328.80 = 9,614.40 : x
  2. Step 2: Convert to fraction form
    10,219.20/15,328.80 = 9,614.40/x
  3. Step 3: Cross multiply
    10,219.20x = 15,328.80 × 9,614.40
  4. Step 4: Simplify right side
    10,219.20x = 147,377,214.72
  5. Step 5: Solve for x
    x = 147,377,214.72/10,219.20
  6. Step 6: Final answer
    x = 14,421.60

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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.