Home / 20,585.13-28,407.47-11,153.69

Finding the Fourth Proportional to 20,585.13, 28,407.47 and 11,153.69

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Solution

The fourth proportional to 20,585.13, 28,407.47 and 11,153.69 is: 15,392.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.13 : 28,407.47 = 11,153.69 : x
  2. Step 2: Convert to fraction form
    20,585.13/28,407.47 = 11,153.69/x
  3. Step 3: Cross multiply
    20,585.13x = 28,407.47 × 11,153.69
  4. Step 4: Simplify right side
    20,585.13x = 316,848,114.06
  5. Step 5: Solve for x
    x = 316,848,114.06/20,585.13
  6. Step 6: Final answer
    x = 15,392.09

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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.