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Finding the Fourth Proportional to 28,053.84, 42,080.76 and 12,482.40

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Solution

The fourth proportional to 28,053.84, 42,080.76 and 12,482.40 is: 18,723.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,053.84 : 42,080.76 = 12,482.40 : x
  2. Step 2: Convert to fraction form
    28,053.84/42,080.76 = 12,482.40/x
  3. Step 3: Cross multiply
    28,053.84x = 42,080.76 × 12,482.40
  4. Step 4: Simplify right side
    28,053.84x = 525,268,878.62
  5. Step 5: Solve for x
    x = 525,268,878.62/28,053.84
  6. Step 6: Final answer
    x = 18,723.60

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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.