Home / 28,275.10-42,420.42-12,492.80

Finding the Fourth Proportional to 28,275.10, 42,420.42 and 12,492.80

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Solution

The fourth proportional to 28,275.10, 42,420.42 and 12,492.80 is: 18,742.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,275.10 : 42,420.42 = 12,492.80 : x
  2. Step 2: Convert to fraction form
    28,275.10/42,420.42 = 12,492.80/x
  3. Step 3: Cross multiply
    28,275.10x = 42,420.42 × 12,492.80
  4. Step 4: Simplify right side
    28,275.10x = 529,949,822.98
  5. Step 5: Solve for x
    x = 529,949,822.98/28,275.10
  6. Step 6: Final answer
    x = 18,742.63

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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.