Home / 28,587.78-42,890.49-12,806.10

Finding the Fourth Proportional to 28,587.78, 42,890.49 and 12,806.10

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Solution

The fourth proportional to 28,587.78, 42,890.49 and 12,806.10 is: 19,213.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,587.78 : 42,890.49 = 12,806.10 : x
  2. Step 2: Convert to fraction form
    28,587.78/42,890.49 = 12,806.10/x
  3. Step 3: Cross multiply
    28,587.78x = 42,890.49 × 12,806.10
  4. Step 4: Simplify right side
    28,587.78x = 549,259,903.99
  5. Step 5: Solve for x
    x = 549,259,903.99/28,587.78
  6. Step 6: Final answer
    x = 19,213.10

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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.