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Finding the Fourth Proportional to 18,830.60, 25,965.02 and 15,417

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Solution

The fourth proportional to 18,830.60, 25,965.02 and 15,417 is: 21,258.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,830.60 : 25,965.02 = 15,417 : x
  2. Step 2: Convert to fraction form
    18,830.60/25,965.02 = 15,417/x
  3. Step 3: Cross multiply
    18,830.60x = 25,965.02 × 15,417
  4. Step 4: Simplify right side
    18,830.60x = 400,302,713.34
  5. Step 5: Solve for x
    x = 400,302,713.34/18,830.60
  6. Step 6: Final answer
    x = 21,258.10

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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.