Home / 20,421.03-28,160.28-19,230.45

Finding the Fourth Proportional to 20,421.03, 28,160.28 and 19,230.45

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Solution

The fourth proportional to 20,421.03, 28,160.28 and 19,230.45 is: 26,518.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.03 : 28,160.28 = 19,230.45 : x
  2. Step 2: Convert to fraction form
    20,421.03/28,160.28 = 19,230.45/x
  3. Step 3: Cross multiply
    20,421.03x = 28,160.28 × 19,230.45
  4. Step 4: Simplify right side
    20,421.03x = 541,534,856.53
  5. Step 5: Solve for x
    x = 541,534,856.53/20,421.03
  6. Step 6: Final answer
    x = 26,518.49

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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.