Home / 20,689.62-31,038.54-7,551.23

Finding the Fourth Proportional to 20,689.62, 31,038.54 and 7,551.23

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Solution

The fourth proportional to 20,689.62, 31,038.54 and 7,551.23 is: 11,328.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.62 : 31,038.54 = 7,551.23 : x
  2. Step 2: Convert to fraction form
    20,689.62/31,038.54 = 7,551.23/x
  3. Step 3: Cross multiply
    20,689.62x = 31,038.54 × 7,551.23
  4. Step 4: Simplify right side
    20,689.62x = 234,378,999.21
  5. Step 5: Solve for x
    x = 234,378,999.21/20,689.62
  6. Step 6: Final answer
    x = 11,328.34

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1.5x scale

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.