Home / 20,510.64-28,305.72-12,550.50

Finding the Fourth Proportional to 20,510.64, 28,305.72 and 12,550.50

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Solution

The fourth proportional to 20,510.64, 28,305.72 and 12,550.50 is: 17,320.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.64 : 28,305.72 = 12,550.50 : x
  2. Step 2: Convert to fraction form
    20,510.64/28,305.72 = 12,550.50/x
  3. Step 3: Cross multiply
    20,510.64x = 28,305.72 × 12,550.50
  4. Step 4: Simplify right side
    20,510.64x = 355,250,938.86
  5. Step 5: Solve for x
    x = 355,250,938.86/20,510.64
  6. Step 6: Final answer
    x = 17,320.32

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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.