Home / 28,587.12-42,895.32-13,611.16

Finding the Fourth Proportional to 28,587.12, 42,895.32 and 13,611.16

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Solution

The fourth proportional to 28,587.12, 42,895.32 and 13,611.16 is: 20,423.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,587.12 : 42,895.32 = 13,611.16 : x
  2. Step 2: Convert to fraction form
    28,587.12/42,895.32 = 13,611.16/x
  3. Step 3: Cross multiply
    28,587.12x = 42,895.32 × 13,611.16
  4. Step 4: Simplify right side
    28,587.12x = 583,855,063.77
  5. Step 5: Solve for x
    x = 583,855,063.77/28,587.12
  6. Step 6: Final answer
    x = 20,423.71

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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.