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Finding the Fourth Proportional to 39,307.50, 54,244.35 and 21,643.50

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Solution

The fourth proportional to 39,307.50, 54,244.35 and 21,643.50 is: 29,868.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,307.50 : 54,244.35 = 21,643.50 : x
  2. Step 2: Convert to fraction form
    39,307.50/54,244.35 = 21,643.50/x
  3. Step 3: Cross multiply
    39,307.50x = 54,244.35 × 21,643.50
  4. Step 4: Simplify right side
    39,307.50x = 1,174,037,589.23
  5. Step 5: Solve for x
    x = 1,174,037,589.23/39,307.50
  6. Step 6: Final answer
    x = 29,868.03

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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.