Home / 28,485-39,309.30-15,910.02

Finding the Fourth Proportional to 28,485, 39,309.30 and 15,910.02

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Solution

The fourth proportional to 28,485, 39,309.30 and 15,910.02 is: 21,955.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,485 : 39,309.30 = 15,910.02 : x
  2. Step 2: Convert to fraction form
    28,485/39,309.30 = 15,910.02/x
  3. Step 3: Cross multiply
    28,485x = 39,309.30 × 15,910.02
  4. Step 4: Simplify right side
    28,485x = 625,411,749.19
  5. Step 5: Solve for x
    x = 625,411,749.19/28,485
  6. Step 6: Final answer
    x = 21,955.83

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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.