Home / 14,678.19-20,255.90-8,390.70

Finding the Fourth Proportional to 14,678.19, 20,255.90 and 8,390.70

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Solution

The fourth proportional to 14,678.19, 20,255.90 and 8,390.70 is: 11,579.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,678.19 : 20,255.90 = 8,390.70 : x
  2. Step 2: Convert to fraction form
    14,678.19/20,255.90 = 8,390.70/x
  3. Step 3: Cross multiply
    14,678.19x = 20,255.90 × 8,390.70
  4. Step 4: Simplify right side
    14,678.19x = 169,961,129.49
  5. Step 5: Solve for x
    x = 169,961,129.49/14,678.19
  6. Step 6: Final answer
    x = 11,579.16

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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.