Home / 39,364.04-54,321.64-21,459.20

Finding the Fourth Proportional to 39,364.04, 54,321.64 and 21,459.20

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Solution

The fourth proportional to 39,364.04, 54,321.64 and 21,459.20 is: 29,613.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,364.04 : 54,321.64 = 21,459.20 : x
  2. Step 2: Convert to fraction form
    39,364.04/54,321.64 = 21,459.20/x
  3. Step 3: Cross multiply
    39,364.04x = 54,321.64 × 21,459.20
  4. Step 4: Simplify right side
    39,364.04x = 1,165,698,937.09
  5. Step 5: Solve for x
    x = 1,165,698,937.09/39,364.04
  6. Step 6: Final answer
    x = 29,613.30

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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.