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Finding the Fourth Proportional to 28,624.60, 42,937.20 and 7,848.10

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Solution

The fourth proportional to 28,624.60, 42,937.20 and 7,848.10 is: 11,772.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,624.60 : 42,937.20 = 7,848.10 : x
  2. Step 2: Convert to fraction form
    28,624.60/42,937.20 = 7,848.10/x
  3. Step 3: Cross multiply
    28,624.60x = 42,937.20 × 7,848.10
  4. Step 4: Simplify right side
    28,624.60x = 336,975,439.32
  5. Step 5: Solve for x
    x = 336,975,439.32/28,624.60
  6. Step 6: Final answer
    x = 11,772.23

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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.