Home / 3,646.65-5,031.21-2,155.07

Finding the Fourth Proportional to 3,646.65, 5,031.21 and 2,155.07

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Solution

The fourth proportional to 3,646.65, 5,031.21 and 2,155.07 is: 2,973.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,646.65 : 5,031.21 = 2,155.07 : x
  2. Step 2: Convert to fraction form
    3,646.65/5,031.21 = 2,155.07/x
  3. Step 3: Cross multiply
    3,646.65x = 5,031.21 × 2,155.07
  4. Step 4: Simplify right side
    3,646.65x = 10,842,630.39
  5. Step 5: Solve for x
    x = 10,842,630.39/3,646.65
  6. Step 6: Final answer
    x = 2,973.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.