Home / 15,866.80-23,775.16-12,890.72

Finding the Fourth Proportional to 15,866.80, 23,775.16 and 12,890.72

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Solution

The fourth proportional to 15,866.80, 23,775.16 and 12,890.72 is: 19,315.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,866.80 : 23,775.16 = 12,890.72 : x
  2. Step 2: Convert to fraction form
    15,866.80/23,775.16 = 12,890.72/x
  3. Step 3: Cross multiply
    15,866.80x = 23,775.16 × 12,890.72
  4. Step 4: Simplify right side
    15,866.80x = 306,478,930.52
  5. Step 5: Solve for x
    x = 306,478,930.52/15,866.80
  6. Step 6: Final answer
    x = 19,315.74

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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.