Home / 28,518.47-39,354.77-15,772.36

Finding the Fourth Proportional to 28,518.47, 39,354.77 and 15,772.36

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Solution

The fourth proportional to 28,518.47, 39,354.77 and 15,772.36 is: 21,765.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,518.47 : 39,354.77 = 15,772.36 : x
  2. Step 2: Convert to fraction form
    28,518.47/39,354.77 = 15,772.36/x
  3. Step 3: Cross multiply
    28,518.47x = 39,354.77 × 15,772.36
  4. Step 4: Simplify right side
    28,518.47x = 620,717,600.16
  5. Step 5: Solve for x
    x = 620,717,600.16/28,518.47
  6. Step 6: Final answer
    x = 21,765.46

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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.