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Finding the Fourth Proportional to 14,289.48, 19,719.45 and 7,916.40

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Solution

The fourth proportional to 14,289.48, 19,719.45 and 7,916.40 is: 10,924.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,289.48 : 19,719.45 = 7,916.40 : x
  2. Step 2: Convert to fraction form
    14,289.48/19,719.45 = 7,916.40/x
  3. Step 3: Cross multiply
    14,289.48x = 19,719.45 × 7,916.40
  4. Step 4: Simplify right side
    14,289.48x = 156,107,053.98
  5. Step 5: Solve for x
    x = 156,107,053.98/14,289.48
  6. Step 6: Final answer
    x = 10,924.61

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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.