Home / 28,381.58-39,169.65-15,636.07

Finding the Fourth Proportional to 28,381.58, 39,169.65 and 15,636.07

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Solution

The fourth proportional to 28,381.58, 39,169.65 and 15,636.07 is: 21,579.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,381.58 : 39,169.65 = 15,636.07 : x
  2. Step 2: Convert to fraction form
    28,381.58/39,169.65 = 15,636.07/x
  3. Step 3: Cross multiply
    28,381.58x = 39,169.65 × 15,636.07
  4. Step 4: Simplify right side
    28,381.58x = 612,459,389.28
  5. Step 5: Solve for x
    x = 612,459,389.28/28,381.58
  6. Step 6: Final answer
    x = 21,579.47

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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.