Home / 13,213.79-18,235.07-7,164.05

Finding the Fourth Proportional to 13,213.79, 18,235.07 and 7,164.05

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Solution

The fourth proportional to 13,213.79, 18,235.07 and 7,164.05 is: 9,886.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,213.79 : 18,235.07 = 7,164.05 : x
  2. Step 2: Convert to fraction form
    13,213.79/18,235.07 = 7,164.05/x
  3. Step 3: Cross multiply
    13,213.79x = 18,235.07 × 7,164.05
  4. Step 4: Simplify right side
    13,213.79x = 130,636,826.24
  5. Step 5: Solve for x
    x = 130,636,826.24/13,213.79
  6. Step 6: Final answer
    x = 9,886.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.