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Finding the Fourth Proportional to 12,258.40, 18,368.70 and 9,123.70

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Solution

The fourth proportional to 12,258.40, 18,368.70 and 9,123.70 is: 13,671.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,258.40 : 18,368.70 = 9,123.70 : x
  2. Step 2: Convert to fraction form
    12,258.40/18,368.70 = 9,123.70/x
  3. Step 3: Cross multiply
    12,258.40x = 18,368.70 × 9,123.70
  4. Step 4: Simplify right side
    12,258.40x = 167,590,508.19
  5. Step 5: Solve for x
    x = 167,590,508.19/12,258.40
  6. Step 6: Final answer
    x = 13,671.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.