Home / 20,705.13-28,569.18-12,209.93

Finding the Fourth Proportional to 20,705.13, 28,569.18 and 12,209.93

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Solution

The fourth proportional to 20,705.13, 28,569.18 and 12,209.93 is: 16,847.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.13 : 28,569.18 = 12,209.93 : x
  2. Step 2: Convert to fraction form
    20,705.13/28,569.18 = 12,209.93/x
  3. Step 3: Cross multiply
    20,705.13x = 28,569.18 × 12,209.93
  4. Step 4: Simplify right side
    20,705.13x = 348,827,545.11
  5. Step 5: Solve for x
    x = 348,827,545.11/20,705.13
  6. Step 6: Final answer
    x = 16,847.40

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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.