Home / 13,178.81-19,770.95-5,387.63

Finding the Fourth Proportional to 13,178.81, 19,770.95 and 5,387.63

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Solution

The fourth proportional to 13,178.81, 19,770.95 and 5,387.63 is: 8,082.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,178.81 : 19,770.95 = 5,387.63 : x
  2. Step 2: Convert to fraction form
    13,178.81/19,770.95 = 5,387.63/x
  3. Step 3: Cross multiply
    13,178.81x = 19,770.95 × 5,387.63
  4. Step 4: Simplify right side
    13,178.81x = 106,518,477.96
  5. Step 5: Solve for x
    x = 106,518,477.96/13,178.81
  6. Step 6: Final answer
    x = 8,082.56

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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.