Home / 39,116.80-53,980.68-21,211.75

Finding the Fourth Proportional to 39,116.80, 53,980.68 and 21,211.75

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Solution

The fourth proportional to 39,116.80, 53,980.68 and 21,211.75 is: 29,271.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,116.80 : 53,980.68 = 21,211.75 : x
  2. Step 2: Convert to fraction form
    39,116.80/53,980.68 = 21,211.75/x
  3. Step 3: Cross multiply
    39,116.80x = 53,980.68 × 21,211.75
  4. Step 4: Simplify right side
    39,116.80x = 1,145,024,688.99
  5. Step 5: Solve for x
    x = 1,145,024,688.99/39,116.80
  6. Step 6: Final answer
    x = 29,271.94

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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.