Home / 39,585.04-54,628.40-21,681.20

Finding the Fourth Proportional to 39,585.04, 54,628.40 and 21,681.20

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Solution

The fourth proportional to 39,585.04, 54,628.40 and 21,681.20 is: 29,920.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,585.04 : 54,628.40 = 21,681.20 : x
  2. Step 2: Convert to fraction form
    39,585.04/54,628.40 = 21,681.20/x
  3. Step 3: Cross multiply
    39,585.04x = 54,628.40 × 21,681.20
  4. Step 4: Simplify right side
    39,585.04x = 1,184,409,456.85
  5. Step 5: Solve for x
    x = 1,184,409,456.85/39,585.04
  6. Step 6: Final answer
    x = 29,920.63

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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.