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Finding the Fourth Proportional to 19,790.40, 27,311.40 and 10,838.40

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Solution

The fourth proportional to 19,790.40, 27,311.40 and 10,838.40 is: 14,957.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,790.40 : 27,311.40 = 10,838.40 : x
  2. Step 2: Convert to fraction form
    19,790.40/27,311.40 = 10,838.40/x
  3. Step 3: Cross multiply
    19,790.40x = 27,311.40 × 10,838.40
  4. Step 4: Simplify right side
    19,790.40x = 296,011,877.76
  5. Step 5: Solve for x
    x = 296,011,877.76/19,790.40
  6. Step 6: Final answer
    x = 14,957.35

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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.