Home / 39,395.35-54,363.58-21,490.21

Finding the Fourth Proportional to 39,395.35, 54,363.58 and 21,490.21

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Solution

The fourth proportional to 39,395.35, 54,363.58 and 21,490.21 is: 29,655.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,395.35 : 54,363.58 = 21,490.21 : x
  2. Step 2: Convert to fraction form
    39,395.35/54,363.58 = 21,490.21/x
  3. Step 3: Cross multiply
    39,395.35x = 54,363.58 × 21,490.21
  4. Step 4: Simplify right side
    39,395.35x = 1,168,284,750.55
  5. Step 5: Solve for x
    x = 1,168,284,750.55/39,395.35
  6. Step 6: Final answer
    x = 29,655.40

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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.