Home / 15,405.20-21,253.91-12,567.63

Finding the Fourth Proportional to 15,405.20, 21,253.91 and 12,567.63

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Solution

The fourth proportional to 15,405.20, 21,253.91 and 12,567.63 is: 17,339.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.20 : 21,253.91 = 12,567.63 : x
  2. Step 2: Convert to fraction form
    15,405.20/21,253.91 = 12,567.63/x
  3. Step 3: Cross multiply
    15,405.20x = 21,253.91 × 12,567.63
  4. Step 4: Simplify right side
    15,405.20x = 267,111,214.10
  5. Step 5: Solve for x
    x = 267,111,214.10/15,405.20
  6. Step 6: Final answer
    x = 17,339.03

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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.