Home / 20,342.93-28,071.95-11,388.92

Finding the Fourth Proportional to 20,342.93, 28,071.95 and 11,388.92

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Solution

The fourth proportional to 20,342.93, 28,071.95 and 11,388.92 is: 15,715.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.93 : 28,071.95 = 11,388.92 : x
  2. Step 2: Convert to fraction form
    20,342.93/28,071.95 = 11,388.92/x
  3. Step 3: Cross multiply
    20,342.93x = 28,071.95 × 11,388.92
  4. Step 4: Simplify right side
    20,342.93x = 319,708,995.49
  5. Step 5: Solve for x
    x = 319,708,995.49/20,342.93
  6. Step 6: Final answer
    x = 15,715.98

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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.