Home / 28,128.48-38,818.08-15,553.68

Finding the Fourth Proportional to 28,128.48, 38,818.08 and 15,553.68

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Solution

The fourth proportional to 28,128.48, 38,818.08 and 15,553.68 is: 21,464.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128.48 : 38,818.08 = 15,553.68 : x
  2. Step 2: Convert to fraction form
    28,128.48/38,818.08 = 15,553.68/x
  3. Step 3: Cross multiply
    28,128.48x = 38,818.08 × 15,553.68
  4. Step 4: Simplify right side
    28,128.48x = 603,763,994.53
  5. Step 5: Solve for x
    x = 603,763,994.53/28,128.48
  6. Step 6: Final answer
    x = 21,464.51

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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.