Home / 12,938.08-19,412.16-5,147.68

Finding the Fourth Proportional to 12,938.08, 19,412.16 and 5,147.68

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Solution

The fourth proportional to 12,938.08, 19,412.16 and 5,147.68 is: 7,723.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.08 : 19,412.16 = 5,147.68 : x
  2. Step 2: Convert to fraction form
    12,938.08/19,412.16 = 5,147.68/x
  3. Step 3: Cross multiply
    12,938.08x = 19,412.16 × 5,147.68
  4. Step 4: Simplify right side
    12,938.08x = 99,927,587.79
  5. Step 5: Solve for x
    x = 99,927,587.79/12,938.08
  6. Step 6: Final answer
    x = 7,723.53

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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.