Home / 39,585.69-54,629.10-21,681.45

Finding the Fourth Proportional to 39,585.69, 54,629.10 and 21,681.45

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Solution

The fourth proportional to 39,585.69, 54,629.10 and 21,681.45 is: 29,920.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,585.69 : 54,629.10 = 21,681.45 : x
  2. Step 2: Convert to fraction form
    39,585.69/54,629.10 = 21,681.45/x
  3. Step 3: Cross multiply
    39,585.69x = 54,629.10 × 21,681.45
  4. Step 4: Simplify right side
    39,585.69x = 1,184,438,100.20
  5. Step 5: Solve for x
    x = 1,184,438,100.20/39,585.69
  6. Step 6: Final answer
    x = 29,920.87

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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.