Home / 13,166.55-19,580.40-12,751.20

Finding the Fourth Proportional to 13,166.55, 19,580.40 and 12,751.20

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Solution

The fourth proportional to 13,166.55, 19,580.40 and 12,751.20 is: 18,962.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,166.55 : 19,580.40 = 12,751.20 : x
  2. Step 2: Convert to fraction form
    13,166.55/19,580.40 = 12,751.20/x
  3. Step 3: Cross multiply
    13,166.55x = 19,580.40 × 12,751.20
  4. Step 4: Simplify right side
    13,166.55x = 249,673,596.48
  5. Step 5: Solve for x
    x = 249,673,596.48/13,166.55
  6. Step 6: Final answer
    x = 18,962.72

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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.