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Finding the Fourth Proportional to 28,392.80, 42,605.40 and 10,875.20

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Solution

The fourth proportional to 28,392.80, 42,605.40 and 10,875.20 is: 16,319.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,392.80 : 42,605.40 = 10,875.20 : x
  2. Step 2: Convert to fraction form
    28,392.80/42,605.40 = 10,875.20/x
  3. Step 3: Cross multiply
    28,392.80x = 42,605.40 × 10,875.20
  4. Step 4: Simplify right side
    28,392.80x = 463,342,246.08
  5. Step 5: Solve for x
    x = 463,342,246.08/28,392.80
  6. Step 6: Final answer
    x = 16,319.01

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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.