Home / 20,330.16-28,055.76-11,378.49

Finding the Fourth Proportional to 20,330.16, 28,055.76 and 11,378.49

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Solution

The fourth proportional to 20,330.16, 28,055.76 and 11,378.49 is: 15,702.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.16 : 28,055.76 = 11,378.49 : x
  2. Step 2: Convert to fraction form
    20,330.16/28,055.76 = 11,378.49/x
  3. Step 3: Cross multiply
    20,330.16x = 28,055.76 × 11,378.49
  4. Step 4: Simplify right side
    20,330.16x = 319,232,036.72
  5. Step 5: Solve for x
    x = 319,232,036.72/20,330.16
  6. Step 6: Final answer
    x = 15,702.39

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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.