Home / 12,555.42-18,837.08-7,878.69

Finding the Fourth Proportional to 12,555.42, 18,837.08 and 7,878.69

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Solution

The fourth proportional to 12,555.42, 18,837.08 and 7,878.69 is: 11,820.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,555.42 : 18,837.08 = 7,878.69 : x
  2. Step 2: Convert to fraction form
    12,555.42/18,837.08 = 7,878.69/x
  3. Step 3: Cross multiply
    12,555.42x = 18,837.08 × 7,878.69
  4. Step 4: Simplify right side
    12,555.42x = 148,411,474.43
  5. Step 5: Solve for x
    x = 148,411,474.43/12,555.42
  6. Step 6: Final answer
    x = 11,820.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.