Home / 30,816.76-42,542.86-21,368.92

Finding the Fourth Proportional to 30,816.76, 42,542.86 and 21,368.92

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Solution

The fourth proportional to 30,816.76, 42,542.86 and 21,368.92 is: 29,500.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,816.76 : 42,542.86 = 21,368.92 : x
  2. Step 2: Convert to fraction form
    30,816.76/42,542.86 = 21,368.92/x
  3. Step 3: Cross multiply
    30,816.76x = 42,542.86 × 21,368.92
  4. Step 4: Simplify right side
    30,816.76x = 909,094,971.91
  5. Step 5: Solve for x
    x = 909,094,971.91/30,816.76
  6. Step 6: Final answer
    x = 29,500.02

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Double scale
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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.