Home / 28,239.84-38,970.98-15,664.58

Finding the Fourth Proportional to 28,239.84, 38,970.98 and 15,664.58

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Solution

The fourth proportional to 28,239.84, 38,970.98 and 15,664.58 is: 21,617.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,239.84 : 38,970.98 = 15,664.58 : x
  2. Step 2: Convert to fraction form
    28,239.84/38,970.98 = 15,664.58/x
  3. Step 3: Cross multiply
    28,239.84x = 38,970.98 × 15,664.58
  4. Step 4: Simplify right side
    28,239.84x = 610,464,033.89
  5. Step 5: Solve for x
    x = 610,464,033.89/28,239.84
  6. Step 6: Final answer
    x = 21,617.12

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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.