Home / 13,521.20-18,672.03-12,784.91

Finding the Fourth Proportional to 13,521.20, 18,672.03 and 12,784.91

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Solution

The fourth proportional to 13,521.20, 18,672.03 and 12,784.91 is: 17,655.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.20 : 18,672.03 = 12,784.91 : x
  2. Step 2: Convert to fraction form
    13,521.20/18,672.03 = 12,784.91/x
  3. Step 3: Cross multiply
    13,521.20x = 18,672.03 × 12,784.91
  4. Step 4: Simplify right side
    13,521.20x = 238,720,129.71
  5. Step 5: Solve for x
    x = 238,720,129.71/13,521.20
  6. Step 6: Final answer
    x = 17,655.25

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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.