Home / 15,390.64-21,237.81-8,677.92

Finding the Fourth Proportional to 15,390.64, 21,237.81 and 8,677.92

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Solution

The fourth proportional to 15,390.64, 21,237.81 and 8,677.92 is: 11,974.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.64 : 21,237.81 = 8,677.92 : x
  2. Step 2: Convert to fraction form
    15,390.64/21,237.81 = 8,677.92/x
  3. Step 3: Cross multiply
    15,390.64x = 21,237.81 × 8,677.92
  4. Step 4: Simplify right side
    15,390.64x = 184,299,992.61
  5. Step 5: Solve for x
    x = 184,299,992.61/15,390.64
  6. Step 6: Final answer
    x = 11,974.81

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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.