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Finding the Fourth Proportional to 14,005.61, 19,328.68 and 7,717.99

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Solution

The fourth proportional to 14,005.61, 19,328.68 and 7,717.99 is: 10,651.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,005.61 : 19,328.68 = 7,717.99 : x
  2. Step 2: Convert to fraction form
    14,005.61/19,328.68 = 7,717.99/x
  3. Step 3: Cross multiply
    14,005.61x = 19,328.68 × 7,717.99
  4. Step 4: Simplify right side
    14,005.61x = 149,178,462.31
  5. Step 5: Solve for x
    x = 149,178,462.31/14,005.61
  6. Step 6: Final answer
    x = 10,651.34

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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.