Home / 13,158.78-19,741.40-9,270.78

Finding the Fourth Proportional to 13,158.78, 19,741.40 and 9,270.78

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Solution

The fourth proportional to 13,158.78, 19,741.40 and 9,270.78 is: 13,908.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.78 : 19,741.40 = 9,270.78 : x
  2. Step 2: Convert to fraction form
    13,158.78/19,741.40 = 9,270.78/x
  3. Step 3: Cross multiply
    13,158.78x = 19,741.40 × 9,270.78
  4. Step 4: Simplify right side
    13,158.78x = 183,018,176.29
  5. Step 5: Solve for x
    x = 183,018,176.29/13,158.78
  6. Step 6: Final answer
    x = 13,908.45

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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.