Home / 19,868.16-29,762.88-13,612.80

Finding the Fourth Proportional to 19,868.16, 29,762.88 and 13,612.80

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Solution

The fourth proportional to 19,868.16, 29,762.88 and 13,612.80 is: 20,392.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,868.16 : 29,762.88 = 13,612.80 : x
  2. Step 2: Convert to fraction form
    19,868.16/29,762.88 = 13,612.80/x
  3. Step 3: Cross multiply
    19,868.16x = 29,762.88 × 13,612.80
  4. Step 4: Simplify right side
    19,868.16x = 405,156,132.86
  5. Step 5: Solve for x
    x = 405,156,132.86/19,868.16
  6. Step 6: Final answer
    x = 20,392.23

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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.