Home / 20,421.04-28,160.28-19,230.46

Finding the Fourth Proportional to 20,421.04, 28,160.28 and 19,230.46

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Solution

The fourth proportional to 20,421.04, 28,160.28 and 19,230.46 is: 26,518.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.04 : 28,160.28 = 19,230.46 : x
  2. Step 2: Convert to fraction form
    20,421.04/28,160.28 = 19,230.46/x
  3. Step 3: Cross multiply
    20,421.04x = 28,160.28 × 19,230.46
  4. Step 4: Simplify right side
    20,421.04x = 541,535,138.13
  5. Step 5: Solve for x
    x = 541,535,138.13/20,421.04
  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.