Home / 10,985.09-15,155.35-7,210.35

Finding the Fourth Proportional to 10,985.09, 15,155.35 and 7,210.35

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Solution

The fourth proportional to 10,985.09, 15,155.35 and 7,210.35 is: 9,947.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,985.09 : 15,155.35 = 7,210.35 : x
  2. Step 2: Convert to fraction form
    10,985.09/15,155.35 = 7,210.35/x
  3. Step 3: Cross multiply
    10,985.09x = 15,155.35 × 7,210.35
  4. Step 4: Simplify right side
    10,985.09x = 109,275,377.87
  5. Step 5: Solve for x
    x = 109,275,377.87/10,985.09
  6. Step 6: Final answer
    x = 9,947.61

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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.