Home / 14,677.50-20,256.30-8,390.28

Finding the Fourth Proportional to 14,677.50, 20,256.30 and 8,390.28

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Solution

The fourth proportional to 14,677.50, 20,256.30 and 8,390.28 is: 11,579.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,677.50 : 20,256.30 = 8,390.28 : x
  2. Step 2: Convert to fraction form
    14,677.50/20,256.30 = 8,390.28/x
  3. Step 3: Cross multiply
    14,677.50x = 20,256.30 × 8,390.28
  4. Step 4: Simplify right side
    14,677.50x = 169,956,028.76
  5. Step 5: Solve for x
    x = 169,956,028.76/14,677.50
  6. Step 6: Final answer
    x = 11,579.36

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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.