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Finding the Fourth Proportional to 19,994.61, 27,595.95 and 15,206.88

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Solution

The fourth proportional to 19,994.61, 27,595.95 and 15,206.88 is: 20,988.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,994.61 : 27,595.95 = 15,206.88 : x
  2. Step 2: Convert to fraction form
    19,994.61/27,595.95 = 15,206.88/x
  3. Step 3: Cross multiply
    19,994.61x = 27,595.95 × 15,206.88
  4. Step 4: Simplify right side
    19,994.61x = 419,648,300.14
  5. Step 5: Solve for x
    x = 419,648,300.14/19,994.61
  6. Step 6: Final answer
    x = 20,988.07

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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.