Home / 5,416.81-8,125.20-1,312.81

Finding the Fourth Proportional to 5,416.81, 8,125.20 and 1,312.81

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Solution

The fourth proportional to 5,416.81, 8,125.20 and 1,312.81 is: 1,969.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,416.81 : 8,125.20 = 1,312.81 : x
  2. Step 2: Convert to fraction form
    5,416.81/8,125.20 = 1,312.81/x
  3. Step 3: Cross multiply
    5,416.81x = 8,125.20 × 1,312.81
  4. Step 4: Simplify right side
    5,416.81x = 10,666,843.81
  5. Step 5: Solve for x
    x = 10,666,843.81/5,416.81
  6. Step 6: Final answer
    x = 1,969.21

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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.