Home / 28,215.49-42,342.68-12,650.53

Finding the Fourth Proportional to 28,215.49, 42,342.68 and 12,650.53

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Solution

The fourth proportional to 28,215.49, 42,342.68 and 12,650.53 is: 18,984.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,215.49 : 42,342.68 = 12,650.53 : x
  2. Step 2: Convert to fraction form
    28,215.49/42,342.68 = 12,650.53/x
  3. Step 3: Cross multiply
    28,215.49x = 42,342.68 × 12,650.53
  4. Step 4: Simplify right side
    28,215.49x = 535,657,280.37
  5. Step 5: Solve for x
    x = 535,657,280.37/28,215.49
  6. Step 6: Final answer
    x = 18,984.51

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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.