Home / 30,957.18-42,720.53-16,810.12

Finding the Fourth Proportional to 30,957.18, 42,720.53 and 16,810.12

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Solution

The fourth proportional to 30,957.18, 42,720.53 and 16,810.12 is: 23,197.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,957.18 : 42,720.53 = 16,810.12 : x
  2. Step 2: Convert to fraction form
    30,957.18/42,720.53 = 16,810.12/x
  3. Step 3: Cross multiply
    30,957.18x = 42,720.53 × 16,810.12
  4. Step 4: Simplify right side
    30,957.18x = 718,137,205.11
  5. Step 5: Solve for x
    x = 718,137,205.11/30,957.18
  6. Step 6: Final answer
    x = 23,197.76

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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.