Home / 20,935.16-28,888.84-11,980.61

Finding the Fourth Proportional to 20,935.16, 28,888.84 and 11,980.61

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Solution

The fourth proportional to 20,935.16, 28,888.84 and 11,980.61 is: 16,532.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.16 : 28,888.84 = 11,980.61 : x
  2. Step 2: Convert to fraction form
    20,935.16/28,888.84 = 11,980.61/x
  3. Step 3: Cross multiply
    20,935.16x = 28,888.84 × 11,980.61
  4. Step 4: Simplify right side
    20,935.16x = 346,105,925.39
  5. Step 5: Solve for x
    x = 346,105,925.39/20,935.16
  6. Step 6: Final answer
    x = 16,532.28

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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.