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Finding the Fourth Proportional to 15,077.88, 20,808.18 and 9,415.98

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Solution

The fourth proportional to 15,077.88, 20,808.18 and 9,415.98 is: 12,994.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,077.88 : 20,808.18 = 9,415.98 : x
  2. Step 2: Convert to fraction form
    15,077.88/20,808.18 = 9,415.98/x
  3. Step 3: Cross multiply
    15,077.88x = 20,808.18 × 9,415.98
  4. Step 4: Simplify right side
    15,077.88x = 195,929,406.72
  5. Step 5: Solve for x
    x = 195,929,406.72/15,077.88
  6. Step 6: Final answer
    x = 12,994.49

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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.