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Finding the Fourth Proportional to 28,362.49, 42,550.08 and 8,642.59

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Solution

The fourth proportional to 28,362.49, 42,550.08 and 8,642.59 is: 12,965.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362.49 : 42,550.08 = 8,642.59 : x
  2. Step 2: Convert to fraction form
    28,362.49/42,550.08 = 8,642.59/x
  3. Step 3: Cross multiply
    28,362.49x = 42,550.08 × 8,642.59
  4. Step 4: Simplify right side
    28,362.49x = 367,742,895.91
  5. Step 5: Solve for x
    x = 367,742,895.91/28,362.49
  6. Step 6: Final answer
    x = 12,965.82

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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.