Home / 15,106.13-20,848.37-9,137.79

Finding the Fourth Proportional to 15,106.13, 20,848.37 and 9,137.79

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Solution

The fourth proportional to 15,106.13, 20,848.37 and 9,137.79 is: 12,611.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,106.13 : 20,848.37 = 9,137.79 : x
  2. Step 2: Convert to fraction form
    15,106.13/20,848.37 = 9,137.79/x
  3. Step 3: Cross multiply
    15,106.13x = 20,848.37 × 9,137.79
  4. Step 4: Simplify right side
    15,106.13x = 190,508,012.53
  5. Step 5: Solve for x
    x = 190,508,012.53/15,106.13
  6. Step 6: Final answer
    x = 12,611.30

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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.