Home / 20,342.34-28,071.05-11,389.77

Finding the Fourth Proportional to 20,342.34, 28,071.05 and 11,389.77

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Solution

The fourth proportional to 20,342.34, 28,071.05 and 11,389.77 is: 15,717.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.34 : 28,071.05 = 11,389.77 : x
  2. Step 2: Convert to fraction form
    20,342.34/28,071.05 = 11,389.77/x
  3. Step 3: Cross multiply
    20,342.34x = 28,071.05 × 11,389.77
  4. Step 4: Simplify right side
    20,342.34x = 319,722,746.21
  5. Step 5: Solve for x
    x = 319,722,746.21/20,342.34
  6. Step 6: Final answer
    x = 15,717.11

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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.