Home / 5,681.80-8,521.40-1,785.28

Finding the Fourth Proportional to 5,681.80, 8,521.40 and 1,785.28

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Solution

The fourth proportional to 5,681.80, 8,521.40 and 1,785.28 is: 2,677.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,681.80 : 8,521.40 = 1,785.28 : x
  2. Step 2: Convert to fraction form
    5,681.80/8,521.40 = 1,785.28/x
  3. Step 3: Cross multiply
    5,681.80x = 8,521.40 × 1,785.28
  4. Step 4: Simplify right side
    5,681.80x = 15,213,084.99
  5. Step 5: Solve for x
    x = 15,213,084.99/5,681.80
  6. Step 6: Final answer
    x = 2,677.51

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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.