Home / 39,220.40-54,124.10-21,315.36

Finding the Fourth Proportional to 39,220.40, 54,124.10 and 21,315.36

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Solution

The fourth proportional to 39,220.40, 54,124.10 and 21,315.36 is: 29,415.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,220.40 : 54,124.10 = 21,315.36 : x
  2. Step 2: Convert to fraction form
    39,220.40/54,124.10 = 21,315.36/x
  3. Step 3: Cross multiply
    39,220.40x = 54,124.10 × 21,315.36
  4. Step 4: Simplify right side
    39,220.40x = 1,153,674,676.18
  5. Step 5: Solve for x
    x = 1,153,674,676.18/39,220.40
  6. Step 6: Final answer
    x = 29,415.17

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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.