Home / 15,318.80-21,139.40-9,360.44

Finding the Fourth Proportional to 15,318.80, 21,139.40 and 9,360.44

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Solution

The fourth proportional to 15,318.80, 21,139.40 and 9,360.44 is: 12,917.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,318.80 : 21,139.40 = 9,360.44 : x
  2. Step 2: Convert to fraction form
    15,318.80/21,139.40 = 9,360.44/x
  3. Step 3: Cross multiply
    15,318.80x = 21,139.40 × 9,360.44
  4. Step 4: Simplify right side
    15,318.80x = 197,874,085.34
  5. Step 5: Solve for x
    x = 197,874,085.34/15,318.80
  6. Step 6: Final answer
    x = 12,917.07

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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.