Home / 28,488.48-39,313.12-15,740.92

Finding the Fourth Proportional to 28,488.48, 39,313.12 and 15,740.92

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Solution

The fourth proportional to 28,488.48, 39,313.12 and 15,740.92 is: 21,721.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,488.48 : 39,313.12 = 15,740.92 : x
  2. Step 2: Convert to fraction form
    28,488.48/39,313.12 = 15,740.92/x
  3. Step 3: Cross multiply
    28,488.48x = 39,313.12 × 15,740.92
  4. Step 4: Simplify right side
    28,488.48x = 618,824,676.87
  5. Step 5: Solve for x
    x = 618,824,676.87/28,488.48
  6. Step 6: Final answer
    x = 21,721.93

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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.