Home / 20,585.03-28,407.36-11,153.58

Finding the Fourth Proportional to 20,585.03, 28,407.36 and 11,153.58

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Solution

The fourth proportional to 20,585.03, 28,407.36 and 11,153.58 is: 15,391.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.03 : 28,407.36 = 11,153.58 : x
  2. Step 2: Convert to fraction form
    20,585.03/28,407.36 = 11,153.58/x
  3. Step 3: Cross multiply
    20,585.03x = 28,407.36 × 11,153.58
  4. Step 4: Simplify right side
    20,585.03x = 316,843,762.35
  5. Step 5: Solve for x
    x = 316,843,762.35/20,585.03
  6. Step 6: Final answer
    x = 15,391.95

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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.