Home / 30,815.76-42,541.48-21,367.92

Finding the Fourth Proportional to 30,815.76, 42,541.48 and 21,367.92

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Solution

The fourth proportional to 30,815.76, 42,541.48 and 21,367.92 is: 29,498.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,815.76 : 42,541.48 = 21,367.92 : x
  2. Step 2: Convert to fraction form
    30,815.76/42,541.48 = 21,367.92/x
  3. Step 3: Cross multiply
    30,815.76x = 42,541.48 × 21,367.92
  4. Step 4: Simplify right side
    30,815.76x = 909,022,941.32
  5. Step 5: Solve for x
    x = 909,022,941.32/30,815.76
  6. Step 6: Final answer
    x = 29,498.64

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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.