Home / 28,443.16-42,686.52-12,871.72

Finding the Fourth Proportional to 28,443.16, 42,686.52 and 12,871.72

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Solution

The fourth proportional to 28,443.16, 42,686.52 and 12,871.72 is: 19,317.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,443.16 : 42,686.52 = 12,871.72 : x
  2. Step 2: Convert to fraction form
    28,443.16/42,686.52 = 12,871.72/x
  3. Step 3: Cross multiply
    28,443.16x = 42,686.52 × 12,871.72
  4. Step 4: Simplify right side
    28,443.16x = 549,448,933.21
  5. Step 5: Solve for x
    x = 549,448,933.21/28,443.16
  6. Step 6: Final answer
    x = 19,317.44

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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.