Home / 20,411.08-28,168.89-11,458.01

Finding the Fourth Proportional to 20,411.08, 28,168.89 and 11,458.01

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Solution

The fourth proportional to 20,411.08, 28,168.89 and 11,458.01 is: 15,812.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.08 : 28,168.89 = 11,458.01 : x
  2. Step 2: Convert to fraction form
    20,411.08/28,168.89 = 11,458.01/x
  3. Step 3: Cross multiply
    20,411.08x = 28,168.89 × 11,458.01
  4. Step 4: Simplify right side
    20,411.08x = 322,759,423.31
  5. Step 5: Solve for x
    x = 322,759,423.31/20,411.08
  6. Step 6: Final answer
    x = 15,812.95

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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.