Home / 15,675.87-21,633.12-8,869.35

Finding the Fourth Proportional to 15,675.87, 21,633.12 and 8,869.35

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Solution

The fourth proportional to 15,675.87, 21,633.12 and 8,869.35 is: 12,239.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,675.87 : 21,633.12 = 8,869.35 : x
  2. Step 2: Convert to fraction form
    15,675.87/21,633.12 = 8,869.35/x
  3. Step 3: Cross multiply
    15,675.87x = 21,633.12 × 8,869.35
  4. Step 4: Simplify right side
    15,675.87x = 191,871,712.87
  5. Step 5: Solve for x
    x = 191,871,712.87/15,675.87
  6. Step 6: Final answer
    x = 12,239.94

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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.