Home / 13,689.12-20,534.80-4,329.78

Finding the Fourth Proportional to 13,689.12, 20,534.80 and 4,329.78

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Solution

The fourth proportional to 13,689.12, 20,534.80 and 4,329.78 is: 6,495.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.12 : 20,534.80 = 4,329.78 : x
  2. Step 2: Convert to fraction form
    13,689.12/20,534.80 = 4,329.78/x
  3. Step 3: Cross multiply
    13,689.12x = 20,534.80 × 4,329.78
  4. Step 4: Simplify right side
    13,689.12x = 88,911,166.34
  5. Step 5: Solve for x
    x = 88,911,166.34/13,689.12
  6. Step 6: Final answer
    x = 6,495.02

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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.