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Finding the Fourth Proportional to 28,159.63, 42,223.04 and 12,364.03

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Solution

The fourth proportional to 28,159.63, 42,223.04 and 12,364.03 is: 18,538.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,159.63 : 42,223.04 = 12,364.03 : x
  2. Step 2: Convert to fraction form
    28,159.63/42,223.04 = 12,364.03/x
  3. Step 3: Cross multiply
    28,159.63x = 42,223.04 × 12,364.03
  4. Step 4: Simplify right side
    28,159.63x = 522,046,660.32
  5. Step 5: Solve for x
    x = 522,046,660.32/28,159.63
  6. Step 6: Final answer
    x = 18,538.84

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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.