Home / 31,070.04-42,861.99-21,001.99

Finding the Fourth Proportional to 31,070.04, 42,861.99 and 21,001.99

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Solution

The fourth proportional to 31,070.04, 42,861.99 and 21,001.99 is: 28,972.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,070.04 : 42,861.99 = 21,001.99 : x
  2. Step 2: Convert to fraction form
    31,070.04/42,861.99 = 21,001.99/x
  3. Step 3: Cross multiply
    31,070.04x = 42,861.99 × 21,001.99
  4. Step 4: Simplify right side
    31,070.04x = 900,187,085.36
  5. Step 5: Solve for x
    x = 900,187,085.36/31,070.04
  6. Step 6: Final answer
    x = 28,972.83

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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.