Home / 30,856.22-42,572.22-18,915.20

Finding the Fourth Proportional to 30,856.22, 42,572.22 and 18,915.20

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Solution

The fourth proportional to 30,856.22, 42,572.22 and 18,915.20 is: 26,097.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,856.22 : 42,572.22 = 18,915.20 : x
  2. Step 2: Convert to fraction form
    30,856.22/42,572.22 = 18,915.20/x
  3. Step 3: Cross multiply
    30,856.22x = 42,572.22 × 18,915.20
  4. Step 4: Simplify right side
    30,856.22x = 805,262,055.74
  5. Step 5: Solve for x
    x = 805,262,055.74/30,856.22
  6. Step 6: Final answer
    x = 26,097.24

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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.