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Finding the Fourth Proportional to 14,280.40, 19,706.95 and 7,992.78

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Solution

The fourth proportional to 14,280.40, 19,706.95 and 7,992.78 is: 11,030.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,280.40 : 19,706.95 = 7,992.78 : x
  2. Step 2: Convert to fraction form
    14,280.40/19,706.95 = 7,992.78/x
  3. Step 3: Cross multiply
    14,280.40x = 19,706.95 × 7,992.78
  4. Step 4: Simplify right side
    14,280.40x = 157,513,251.91
  5. Step 5: Solve for x
    x = 157,513,251.91/14,280.40
  6. Step 6: Final answer
    x = 11,030.03

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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.