Home / 15,340.06-21,160.89-9,890.83

Finding the Fourth Proportional to 15,340.06, 21,160.89 and 9,890.83

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Solution

The fourth proportional to 15,340.06, 21,160.89 and 9,890.83 is: 13,643.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,340.06 : 21,160.89 = 9,890.83 : x
  2. Step 2: Convert to fraction form
    15,340.06/21,160.89 = 9,890.83/x
  3. Step 3: Cross multiply
    15,340.06x = 21,160.89 × 9,890.83
  4. Step 4: Simplify right side
    15,340.06x = 209,298,716.18
  5. Step 5: Solve for x
    x = 209,298,716.18/15,340.06
  6. Step 6: Final answer
    x = 13,643.93

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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.