Home / 28,389.58-39,177.12-15,643.96

Finding the Fourth Proportional to 28,389.58, 39,177.12 and 15,643.96

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Solution

The fourth proportional to 28,389.58, 39,177.12 and 15,643.96 is: 21,588.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,389.58 : 39,177.12 = 15,643.96 : x
  2. Step 2: Convert to fraction form
    28,389.58/39,177.12 = 15,643.96/x
  3. Step 3: Cross multiply
    28,389.58x = 39,177.12 × 15,643.96
  4. Step 4: Simplify right side
    28,389.58x = 612,885,298.20
  5. Step 5: Solve for x
    x = 612,885,298.20/28,389.58
  6. Step 6: Final answer
    x = 21,588.39

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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.