Home / 10,378.55-15,570.81-5,115.14

Finding the Fourth Proportional to 10,378.55, 15,570.81 and 5,115.14

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Solution

The fourth proportional to 10,378.55, 15,570.81 and 5,115.14 is: 7,674.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,378.55 : 15,570.81 = 5,115.14 : x
  2. Step 2: Convert to fraction form
    10,378.55/15,570.81 = 5,115.14/x
  3. Step 3: Cross multiply
    10,378.55x = 15,570.81 × 5,115.14
  4. Step 4: Simplify right side
    10,378.55x = 79,646,795.21
  5. Step 5: Solve for x
    x = 79,646,795.21/10,378.55
  6. Step 6: Final answer
    x = 7,674.18

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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.