Home / 20,369.10-28,108.89-11,870.68

Finding the Fourth Proportional to 20,369.10, 28,108.89 and 11,870.68

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Solution

The fourth proportional to 20,369.10, 28,108.89 and 11,870.68 is: 16,381.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,369.10 : 28,108.89 = 11,870.68 : x
  2. Step 2: Convert to fraction form
    20,369.10/28,108.89 = 11,870.68/x
  3. Step 3: Cross multiply
    20,369.10x = 28,108.89 × 11,870.68
  4. Step 4: Simplify right side
    20,369.10x = 333,671,638.35
  5. Step 5: Solve for x
    x = 333,671,638.35/20,369.10
  6. Step 6: Final answer
    x = 16,381.27

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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.