Home / 9,720.95-13,400.58-6,879.51

Finding the Fourth Proportional to 9,720.95, 13,400.58 and 6,879.51

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Solution

The fourth proportional to 9,720.95, 13,400.58 and 6,879.51 is: 9,483.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,720.95 : 13,400.58 = 6,879.51 : x
  2. Step 2: Convert to fraction form
    9,720.95/13,400.58 = 6,879.51/x
  3. Step 3: Cross multiply
    9,720.95x = 13,400.58 × 6,879.51
  4. Step 4: Simplify right side
    9,720.95x = 92,189,424.12
  5. Step 5: Solve for x
    x = 92,189,424.12/9,720.95
  6. Step 6: Final answer
    x = 9,483.59

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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.