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Finding the Fourth Proportional to 14,403.76, 19,877.18 and 7,779.76

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Solution

The fourth proportional to 14,403.76, 19,877.18 and 7,779.76 is: 10,736.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,403.76 : 19,877.18 = 7,779.76 : x
  2. Step 2: Convert to fraction form
    14,403.76/19,877.18 = 7,779.76/x
  3. Step 3: Cross multiply
    14,403.76x = 19,877.18 × 7,779.76
  4. Step 4: Simplify right side
    14,403.76x = 154,639,689.88
  5. Step 5: Solve for x
    x = 154,639,689.88/14,403.76
  6. Step 6: Final answer
    x = 10,736.06

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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.