Home / 15,643.96-21,596.70-13,520.68

Finding the Fourth Proportional to 15,643.96, 21,596.70 and 13,520.68

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Solution

The fourth proportional to 15,643.96, 21,596.70 and 13,520.68 is: 18,665.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,643.96 : 21,596.70 = 13,520.68 : x
  2. Step 2: Convert to fraction form
    15,643.96/21,596.70 = 13,520.68/x
  3. Step 3: Cross multiply
    15,643.96x = 21,596.70 × 13,520.68
  4. Step 4: Simplify right side
    15,643.96x = 292,002,069.76
  5. Step 5: Solve for x
    x = 292,002,069.76/15,643.96
  6. Step 6: Final answer
    x = 18,665.48

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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.