Home / 20,830.48-28,746.04-11,399.04

Finding the Fourth Proportional to 20,830.48, 28,746.04 and 11,399.04

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Solution

The fourth proportional to 20,830.48, 28,746.04 and 11,399.04 is: 15,730.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.48 : 28,746.04 = 11,399.04 : x
  2. Step 2: Convert to fraction form
    20,830.48/28,746.04 = 11,399.04/x
  3. Step 3: Cross multiply
    20,830.48x = 28,746.04 × 11,399.04
  4. Step 4: Simplify right side
    20,830.48x = 327,677,259.80
  5. Step 5: Solve for x
    x = 327,677,259.80/20,830.48
  6. Step 6: Final answer
    x = 15,730.66

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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.