Home / 15,374.39-21,218.67-8,661.32

Finding the Fourth Proportional to 15,374.39, 21,218.67 and 8,661.32

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Solution

The fourth proportional to 15,374.39, 21,218.67 and 8,661.32 is: 11,953.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,374.39 : 21,218.67 = 8,661.32 : x
  2. Step 2: Convert to fraction form
    15,374.39/21,218.67 = 8,661.32/x
  3. Step 3: Cross multiply
    15,374.39x = 21,218.67 × 8,661.32
  4. Step 4: Simplify right side
    15,374.39x = 183,781,690.84
  5. Step 5: Solve for x
    x = 183,781,690.84/15,374.39
  6. Step 6: Final answer
    x = 11,953.75

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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.