Home / 28,587.68-42,884.40-7,811.36

Finding the Fourth Proportional to 28,587.68, 42,884.40 and 7,811.36

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Solution

The fourth proportional to 28,587.68, 42,884.40 and 7,811.36 is: 11,717.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,587.68 : 42,884.40 = 7,811.36 : x
  2. Step 2: Convert to fraction form
    28,587.68/42,884.40 = 7,811.36/x
  3. Step 3: Cross multiply
    28,587.68x = 42,884.40 × 7,811.36
  4. Step 4: Simplify right side
    28,587.68x = 334,985,486.78
  5. Step 5: Solve for x
    x = 334,985,486.78/28,587.68
  6. Step 6: Final answer
    x = 11,717.83

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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.