Home / 20,529.32-28,332.09-11,577.65

Finding the Fourth Proportional to 20,529.32, 28,332.09 and 11,577.65

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Solution

The fourth proportional to 20,529.32, 28,332.09 and 11,577.65 is: 15,978.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,529.32 : 28,332.09 = 11,577.65 : x
  2. Step 2: Convert to fraction form
    20,529.32/28,332.09 = 11,577.65/x
  3. Step 3: Cross multiply
    20,529.32x = 28,332.09 × 11,577.65
  4. Step 4: Simplify right side
    20,529.32x = 328,018,880.13
  5. Step 5: Solve for x
    x = 328,018,880.13/20,529.32
  6. Step 6: Final answer
    x = 15,978.07

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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.