Home / 13,260.72-19,769.10-12,638.64

Finding the Fourth Proportional to 13,260.72, 19,769.10 and 12,638.64

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Solution

The fourth proportional to 13,260.72, 19,769.10 and 12,638.64 is: 18,841.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,260.72 : 19,769.10 = 12,638.64 : x
  2. Step 2: Convert to fraction form
    13,260.72/19,769.10 = 12,638.64/x
  3. Step 3: Cross multiply
    13,260.72x = 19,769.10 × 12,638.64
  4. Step 4: Simplify right side
    13,260.72x = 249,854,538.02
  5. Step 5: Solve for x
    x = 249,854,538.02/13,260.72
  6. Step 6: Final answer
    x = 18,841.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.