Home / 21,823.52-30,098-18,437.20

Finding the Fourth Proportional to 21,823.52, 30,098 and 18,437.20

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Solution

The fourth proportional to 21,823.52, 30,098 and 18,437.20 is: 25,427.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,823.52 : 30,098 = 18,437.20 : x
  2. Step 2: Convert to fraction form
    21,823.52/30,098 = 18,437.20/x
  3. Step 3: Cross multiply
    21,823.52x = 30,098 × 18,437.20
  4. Step 4: Simplify right side
    21,823.52x = 554,922,845.60
  5. Step 5: Solve for x
    x = 554,922,845.60/21,823.52
  6. Step 6: Final answer
    x = 25,427.74

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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.