Home / 28,411.89-39,208.51-15,664.80

Finding the Fourth Proportional to 28,411.89, 39,208.51 and 15,664.80

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Solution

The fourth proportional to 28,411.89, 39,208.51 and 15,664.80 is: 21,617.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,411.89 : 39,208.51 = 15,664.80 : x
  2. Step 2: Convert to fraction form
    28,411.89/39,208.51 = 15,664.80/x
  3. Step 3: Cross multiply
    28,411.89x = 39,208.51 × 15,664.80
  4. Step 4: Simplify right side
    28,411.89x = 614,193,428.29
  5. Step 5: Solve for x
    x = 614,193,428.29/28,411.89
  6. Step 6: Final answer
    x = 21,617.48

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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.