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Finding the Fourth Proportional to 18,984.32, 28,482.57 and 9,124.31

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Solution

The fourth proportional to 18,984.32, 28,482.57 and 9,124.31 is: 13,689.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,984.32 : 28,482.57 = 9,124.31 : x
  2. Step 2: Convert to fraction form
    18,984.32/28,482.57 = 9,124.31/x
  3. Step 3: Cross multiply
    18,984.32x = 28,482.57 × 9,124.31
  4. Step 4: Simplify right side
    18,984.32x = 259,883,798.28
  5. Step 5: Solve for x
    x = 259,883,798.28/18,984.32
  6. Step 6: Final answer
    x = 13,689.39

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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.