Home / 20,587.83-28,411.76-12,518.70

Finding the Fourth Proportional to 20,587.83, 28,411.76 and 12,518.70

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Solution

The fourth proportional to 20,587.83, 28,411.76 and 12,518.70 is: 17,276.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.83 : 28,411.76 = 12,518.70 : x
  2. Step 2: Convert to fraction form
    20,587.83/28,411.76 = 12,518.70/x
  3. Step 3: Cross multiply
    20,587.83x = 28,411.76 × 12,518.70
  4. Step 4: Simplify right side
    20,587.83x = 355,678,237.32
  5. Step 5: Solve for x
    x = 355,678,237.32/20,587.83
  6. Step 6: Final answer
    x = 17,276.14

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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.