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Finding the Fourth Proportional to 12,955.15, 19,428.94 and 5,931.19

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Solution

The fourth proportional to 12,955.15, 19,428.94 and 5,931.19 is: 8,895.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,955.15 : 19,428.94 = 5,931.19 : x
  2. Step 2: Convert to fraction form
    12,955.15/19,428.94 = 5,931.19/x
  3. Step 3: Cross multiply
    12,955.15x = 19,428.94 × 5,931.19
  4. Step 4: Simplify right side
    12,955.15x = 115,236,734.64
  5. Step 5: Solve for x
    x = 115,236,734.64/12,955.15
  6. Step 6: Final answer
    x = 8,895.05

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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.