Home / 10,639.40-14,681.75-7,818.62

Finding the Fourth Proportional to 10,639.40, 14,681.75 and 7,818.62

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Solution

The fourth proportional to 10,639.40, 14,681.75 and 7,818.62 is: 10,789.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,639.40 : 14,681.75 = 7,818.62 : x
  2. Step 2: Convert to fraction form
    10,639.40/14,681.75 = 7,818.62/x
  3. Step 3: Cross multiply
    10,639.40x = 14,681.75 × 7,818.62
  4. Step 4: Simplify right side
    10,639.40x = 114,790,911.68
  5. Step 5: Solve for x
    x = 114,790,911.68/10,639.40
  6. Step 6: Final answer
    x = 10,789.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.