Home / 39,018.50-53,845.37-21,113.80

Finding the Fourth Proportional to 39,018.50, 53,845.37 and 21,113.80

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Solution

The fourth proportional to 39,018.50, 53,845.37 and 21,113.80 is: 29,136.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,018.50 : 53,845.37 = 21,113.80 : x
  2. Step 2: Convert to fraction form
    39,018.50/53,845.37 = 21,113.80/x
  3. Step 3: Cross multiply
    39,018.50x = 53,845.37 × 21,113.80
  4. Step 4: Simplify right side
    39,018.50x = 1,136,880,373.11
  5. Step 5: Solve for x
    x = 1,136,880,373.11/39,018.50
  6. Step 6: Final answer
    x = 29,136.96

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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.