Home / 15,487.02-21,344.58-12,636.09

Finding the Fourth Proportional to 15,487.02, 21,344.58 and 12,636.09

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Solution

The fourth proportional to 15,487.02, 21,344.58 and 12,636.09 is: 17,415.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,487.02 : 21,344.58 = 12,636.09 : x
  2. Step 2: Convert to fraction form
    15,487.02/21,344.58 = 12,636.09/x
  3. Step 3: Cross multiply
    15,487.02x = 21,344.58 × 12,636.09
  4. Step 4: Simplify right side
    15,487.02x = 269,712,033.89
  5. Step 5: Solve for x
    x = 269,712,033.89/15,487.02
  6. Step 6: Final answer
    x = 17,415.36

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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.