Home / 15,515.07-21,415.20-9,145.37

Finding the Fourth Proportional to 15,515.07, 21,415.20 and 9,145.37

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Solution

The fourth proportional to 15,515.07, 21,415.20 and 9,145.37 is: 12,623.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.07 : 21,415.20 = 9,145.37 : x
  2. Step 2: Convert to fraction form
    15,515.07/21,415.20 = 9,145.37/x
  3. Step 3: Cross multiply
    15,515.07x = 21,415.20 × 9,145.37
  4. Step 4: Simplify right side
    15,515.07x = 195,849,820.55
  5. Step 5: Solve for x
    x = 195,849,820.55/15,515.07
  6. Step 6: Final answer
    x = 12,623.20

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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.