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Finding the Fourth Proportional to 14,458.72, 19,953.76 and 8,490.72

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Solution

The fourth proportional to 14,458.72, 19,953.76 and 8,490.72 is: 11,717.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,458.72 : 19,953.76 = 8,490.72 : x
  2. Step 2: Convert to fraction form
    14,458.72/19,953.76 = 8,490.72/x
  3. Step 3: Cross multiply
    14,458.72x = 19,953.76 × 8,490.72
  4. Step 4: Simplify right side
    14,458.72x = 169,421,789.11
  5. Step 5: Solve for x
    x = 169,421,789.11/14,458.72
  6. Step 6: Final answer
    x = 11,717.62

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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.