Home / 10,439.07-15,639.75-6,920.75

Finding the Fourth Proportional to 10,439.07, 15,639.75 and 6,920.75

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Solution

The fourth proportional to 10,439.07, 15,639.75 and 6,920.75 is: 10,368.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,439.07 : 15,639.75 = 6,920.75 : x
  2. Step 2: Convert to fraction form
    10,439.07/15,639.75 = 6,920.75/x
  3. Step 3: Cross multiply
    10,439.07x = 15,639.75 × 6,920.75
  4. Step 4: Simplify right side
    10,439.07x = 108,238,721.61
  5. Step 5: Solve for x
    x = 108,238,721.61/10,439.07
  6. Step 6: Final answer
    x = 10,368.62

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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.