Home / 12,945.60-19,421.10-7,394.40

Finding the Fourth Proportional to 12,945.60, 19,421.10 and 7,394.40

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Solution

The fourth proportional to 12,945.60, 19,421.10 and 7,394.40 is: 11,093.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,945.60 : 19,421.10 = 7,394.40 : x
  2. Step 2: Convert to fraction form
    12,945.60/19,421.10 = 7,394.40/x
  3. Step 3: Cross multiply
    12,945.60x = 19,421.10 × 7,394.40
  4. Step 4: Simplify right side
    12,945.60x = 143,607,381.84
  5. Step 5: Solve for x
    x = 143,607,381.84/12,945.60
  6. Step 6: Final answer
    x = 11,093.14

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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.