Home / 13,209.86-18,228.84-7,904.63

Finding the Fourth Proportional to 13,209.86, 18,228.84 and 7,904.63

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Solution

The fourth proportional to 13,209.86, 18,228.84 and 7,904.63 is: 10,907.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,209.86 : 18,228.84 = 7,904.63 : x
  2. Step 2: Convert to fraction form
    13,209.86/18,228.84 = 7,904.63/x
  3. Step 3: Cross multiply
    13,209.86x = 18,228.84 × 7,904.63
  4. Step 4: Simplify right side
    13,209.86x = 144,092,235.53
  5. Step 5: Solve for x
    x = 144,092,235.53/13,209.86
  6. Step 6: Final answer
    x = 10,907.93

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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.