Home / 13,312.57-19,934.70-12,918.40

Finding the Fourth Proportional to 13,312.57, 19,934.70 and 12,918.40

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Solution

The fourth proportional to 13,312.57, 19,934.70 and 12,918.40 is: 19,344.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,312.57 : 19,934.70 = 12,918.40 : x
  2. Step 2: Convert to fraction form
    13,312.57/19,934.70 = 12,918.40/x
  3. Step 3: Cross multiply
    13,312.57x = 19,934.70 × 12,918.40
  4. Step 4: Simplify right side
    13,312.57x = 257,524,428.48
  5. Step 5: Solve for x
    x = 257,524,428.48/13,312.57
  6. Step 6: Final answer
    x = 19,344.46

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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.