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Finding the Fourth Proportional to 18,975.61, 28,460.77 and 10,429.74

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Solution

The fourth proportional to 18,975.61, 28,460.77 and 10,429.74 is: 15,643.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,975.61 : 28,460.77 = 10,429.74 : x
  2. Step 2: Convert to fraction form
    18,975.61/28,460.77 = 10,429.74/x
  3. Step 3: Cross multiply
    18,975.61x = 28,460.77 × 10,429.74
  4. Step 4: Simplify right side
    18,975.61x = 296,838,464.73
  5. Step 5: Solve for x
    x = 296,838,464.73/18,975.61
  6. Step 6: Final answer
    x = 15,643.15

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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.