Home / 20,894.10-31,312.70-11,520.08

Finding the Fourth Proportional to 20,894.10, 31,312.70 and 11,520.08

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Solution

The fourth proportional to 20,894.10, 31,312.70 and 11,520.08 is: 17,264.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,894.10 : 31,312.70 = 11,520.08 : x
  2. Step 2: Convert to fraction form
    20,894.10/31,312.70 = 11,520.08/x
  3. Step 3: Cross multiply
    20,894.10x = 31,312.70 × 11,520.08
  4. Step 4: Simplify right side
    20,894.10x = 360,724,809.02
  5. Step 5: Solve for x
    x = 360,724,809.02/20,894.10
  6. Step 6: Final answer
    x = 17,264.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.