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Finding the Fourth Proportional to 19,811.61, 27,340.04 and 10,859.16

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Solution

The fourth proportional to 19,811.61, 27,340.04 and 10,859.16 is: 14,985.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,811.61 : 27,340.04 = 10,859.16 : x
  2. Step 2: Convert to fraction form
    19,811.61/27,340.04 = 10,859.16/x
  3. Step 3: Cross multiply
    19,811.61x = 27,340.04 × 10,859.16
  4. Step 4: Simplify right side
    19,811.61x = 296,889,868.77
  5. Step 5: Solve for x
    x = 296,889,868.77/19,811.61
  6. Step 6: Final answer
    x = 14,985.65

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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.