Home / 7,085.60-10,628.80-2,155.40

Finding the Fourth Proportional to 7,085.60, 10,628.80 and 2,155.40

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Solution

The fourth proportional to 7,085.60, 10,628.80 and 2,155.40 is: 3,233.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,085.60 : 10,628.80 = 2,155.40 : x
  2. Step 2: Convert to fraction form
    7,085.60/10,628.80 = 2,155.40/x
  3. Step 3: Cross multiply
    7,085.60x = 10,628.80 × 2,155.40
  4. Step 4: Simplify right side
    7,085.60x = 22,909,315.52
  5. Step 5: Solve for x
    x = 22,909,315.52/7,085.60
  6. Step 6: Final answer
    x = 3,233.22

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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.