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Finding the Fourth Proportional to 18,783.71, 25,899.53 and 14,994.74

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Solution

The fourth proportional to 18,783.71, 25,899.53 and 14,994.74 is: 20,675.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.71 : 25,899.53 = 14,994.74 : x
  2. Step 2: Convert to fraction form
    18,783.71/25,899.53 = 14,994.74/x
  3. Step 3: Cross multiply
    18,783.71x = 25,899.53 × 14,994.74
  4. Step 4: Simplify right side
    18,783.71x = 388,356,646.91
  5. Step 5: Solve for x
    x = 388,356,646.91/18,783.71
  6. Step 6: Final answer
    x = 20,675.18

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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.