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Finding the Fourth Proportional to 14,877.72, 20,529.02 and 9,579.72

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Solution

The fourth proportional to 14,877.72, 20,529.02 and 9,579.72 is: 13,218.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,877.72 : 20,529.02 = 9,579.72 : x
  2. Step 2: Convert to fraction form
    14,877.72/20,529.02 = 9,579.72/x
  3. Step 3: Cross multiply
    14,877.72x = 20,529.02 × 9,579.72
  4. Step 4: Simplify right side
    14,877.72x = 196,662,215.58
  5. Step 5: Solve for x
    x = 196,662,215.58/14,877.72
  6. Step 6: Final answer
    x = 13,218.57

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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.