Home / 15,225.18-21,009.89-8,509.47

Finding the Fourth Proportional to 15,225.18, 21,009.89 and 8,509.47

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Solution

The fourth proportional to 15,225.18, 21,009.89 and 8,509.47 is: 11,742.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,225.18 : 21,009.89 = 8,509.47 : x
  2. Step 2: Convert to fraction form
    15,225.18/21,009.89 = 8,509.47/x
  3. Step 3: Cross multiply
    15,225.18x = 21,009.89 × 8,509.47
  4. Step 4: Simplify right side
    15,225.18x = 178,782,986.11
  5. Step 5: Solve for x
    x = 178,782,986.11/15,225.18
  6. Step 6: Final answer
    x = 11,742.59

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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.