Home / 13,311.12-19,966.80-5,711.40

Finding the Fourth Proportional to 13,311.12, 19,966.80 and 5,711.40

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Solution

The fourth proportional to 13,311.12, 19,966.80 and 5,711.40 is: 8,567.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,311.12 : 19,966.80 = 5,711.40 : x
  2. Step 2: Convert to fraction form
    13,311.12/19,966.80 = 5,711.40/x
  3. Step 3: Cross multiply
    13,311.12x = 19,966.80 × 5,711.40
  4. Step 4: Simplify right side
    13,311.12x = 114,038,381.52
  5. Step 5: Solve for x
    x = 114,038,381.52/13,311.12
  6. Step 6: Final answer
    x = 8,567.15

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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.