Home / 28,530.70-39,370.59-15,783.58

Finding the Fourth Proportional to 28,530.70, 39,370.59 and 15,783.58

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Solution

The fourth proportional to 28,530.70, 39,370.59 and 15,783.58 is: 21,780.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,530.70 : 39,370.59 = 15,783.58 : x
  2. Step 2: Convert to fraction form
    28,530.70/39,370.59 = 15,783.58/x
  3. Step 3: Cross multiply
    28,530.70x = 39,370.59 × 15,783.58
  4. Step 4: Simplify right side
    28,530.70x = 621,408,856.91
  5. Step 5: Solve for x
    x = 621,408,856.91/28,530.70
  6. Step 6: Final answer
    x = 21,780.36

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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.