Home / 15,385.75-21,235.10-14,684.56

Finding the Fourth Proportional to 15,385.75, 21,235.10 and 14,684.56

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Solution

The fourth proportional to 15,385.75, 21,235.10 and 14,684.56 is: 20,267.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.75 : 21,235.10 = 14,684.56 : x
  2. Step 2: Convert to fraction form
    15,385.75/21,235.10 = 14,684.56/x
  3. Step 3: Cross multiply
    15,385.75x = 21,235.10 × 14,684.56
  4. Step 4: Simplify right side
    15,385.75x = 311,827,973.55
  5. Step 5: Solve for x
    x = 311,827,973.55/15,385.75
  6. Step 6: Final answer
    x = 20,267.33

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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.