Home / 10,811.34-14,920.29-6,620.40

Finding the Fourth Proportional to 10,811.34, 14,920.29 and 6,620.40

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Solution

The fourth proportional to 10,811.34, 14,920.29 and 6,620.40 is: 9,136.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,811.34 : 14,920.29 = 6,620.40 : x
  2. Step 2: Convert to fraction form
    10,811.34/14,920.29 = 6,620.40/x
  3. Step 3: Cross multiply
    10,811.34x = 14,920.29 × 6,620.40
  4. Step 4: Simplify right side
    10,811.34x = 98,778,287.92
  5. Step 5: Solve for x
    x = 98,778,287.92/10,811.34
  6. Step 6: Final answer
    x = 9,136.54

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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.