Home / 30,701.16-42,322.50-21,720.96

Finding the Fourth Proportional to 30,701.16, 42,322.50 and 21,720.96

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Solution

The fourth proportional to 30,701.16, 42,322.50 and 21,720.96 is: 29,943.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,701.16 : 42,322.50 = 21,720.96 : x
  2. Step 2: Convert to fraction form
    30,701.16/42,322.50 = 21,720.96/x
  3. Step 3: Cross multiply
    30,701.16x = 42,322.50 × 21,720.96
  4. Step 4: Simplify right side
    30,701.16x = 919,285,329.60
  5. Step 5: Solve for x
    x = 919,285,329.60/30,701.16
  6. Step 6: Final answer
    x = 29,943.02

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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.