Home / 10,479.80-15,711.70-5,289.40

Finding the Fourth Proportional to 10,479.80, 15,711.70 and 5,289.40

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Solution

The fourth proportional to 10,479.80, 15,711.70 and 5,289.40 is: 7,930.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,479.80 : 15,711.70 = 5,289.40 : x
  2. Step 2: Convert to fraction form
    10,479.80/15,711.70 = 5,289.40/x
  3. Step 3: Cross multiply
    10,479.80x = 15,711.70 × 5,289.40
  4. Step 4: Simplify right side
    10,479.80x = 83,105,465.98
  5. Step 5: Solve for x
    x = 83,105,465.98/10,479.80
  6. Step 6: Final answer
    x = 7,930.06

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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.