Home / 20,878.40-28,823.30-14,199.68

Finding the Fourth Proportional to 20,878.40, 28,823.30 and 14,199.68

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Solution

The fourth proportional to 20,878.40, 28,823.30 and 14,199.68 is: 19,603.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.40 : 28,823.30 = 14,199.68 : x
  2. Step 2: Convert to fraction form
    20,878.40/28,823.30 = 14,199.68/x
  3. Step 3: Cross multiply
    20,878.40x = 28,823.30 × 14,199.68
  4. Step 4: Simplify right side
    20,878.40x = 409,281,636.54
  5. Step 5: Solve for x
    x = 409,281,636.54/20,878.40
  6. Step 6: Final answer
    x = 19,603.11

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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.