Home / 28,389.84-39,179.74-15,814.58

Finding the Fourth Proportional to 28,389.84, 39,179.74 and 15,814.58

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Solution

The fourth proportional to 28,389.84, 39,179.74 and 15,814.58 is: 21,825.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,389.84 : 39,179.74 = 15,814.58 : x
  2. Step 2: Convert to fraction form
    28,389.84/39,179.74 = 15,814.58/x
  3. Step 3: Cross multiply
    28,389.84x = 39,179.74 × 15,814.58
  4. Step 4: Simplify right side
    28,389.84x = 619,611,132.61
  5. Step 5: Solve for x
    x = 619,611,132.61/28,389.84
  6. Step 6: Final answer
    x = 21,825.10

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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.