Home / 5,146.61-7,720.19-1,636.91

Finding the Fourth Proportional to 5,146.61, 7,720.19 and 1,636.91

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Solution

The fourth proportional to 5,146.61, 7,720.19 and 1,636.91 is: 2,455.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,146.61 : 7,720.19 = 1,636.91 : x
  2. Step 2: Convert to fraction form
    5,146.61/7,720.19 = 1,636.91/x
  3. Step 3: Cross multiply
    5,146.61x = 7,720.19 × 1,636.91
  4. Step 4: Simplify right side
    5,146.61x = 12,637,239.91
  5. Step 5: Solve for x
    x = 12,637,239.91/5,146.61
  6. Step 6: Final answer
    x = 2,455.45

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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.