Home / 12,678.64-19,016.88-3,913.62

Finding the Fourth Proportional to 12,678.64, 19,016.88 and 3,913.62

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Solution

The fourth proportional to 12,678.64, 19,016.88 and 3,913.62 is: 5,870.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.64 : 19,016.88 = 3,913.62 : x
  2. Step 2: Convert to fraction form
    12,678.64/19,016.88 = 3,913.62/x
  3. Step 3: Cross multiply
    12,678.64x = 19,016.88 × 3,913.62
  4. Step 4: Simplify right side
    12,678.64x = 74,424,841.91
  5. Step 5: Solve for x
    x = 74,424,841.91/12,678.64
  6. Step 6: Final answer
    x = 5,870.10

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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.