Home / 39,543.80-54,569.96-21,638.60

Finding the Fourth Proportional to 39,543.80, 54,569.96 and 21,638.60

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Solution

The fourth proportional to 39,543.80, 54,569.96 and 21,638.60 is: 29,861.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,543.80 : 54,569.96 = 21,638.60 : x
  2. Step 2: Convert to fraction form
    39,543.80/54,569.96 = 21,638.60/x
  3. Step 3: Cross multiply
    39,543.80x = 54,569.96 × 21,638.60
  4. Step 4: Simplify right side
    39,543.80x = 1,180,817,536.46
  5. Step 5: Solve for x
    x = 1,180,817,536.46/39,543.80
  6. Step 6: Final answer
    x = 29,861.00

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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.