Home / 13,612.04-18,784.14-8,315.72

Finding the Fourth Proportional to 13,612.04, 18,784.14 and 8,315.72

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Solution

The fourth proportional to 13,612.04, 18,784.14 and 8,315.72 is: 11,475.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.04 : 18,784.14 = 8,315.72 : x
  2. Step 2: Convert to fraction form
    13,612.04/18,784.14 = 8,315.72/x
  3. Step 3: Cross multiply
    13,612.04x = 18,784.14 × 8,315.72
  4. Step 4: Simplify right side
    13,612.04x = 156,203,648.68
  5. Step 5: Solve for x
    x = 156,203,648.68/13,612.04
  6. Step 6: Final answer
    x = 11,475.40

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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.