Home / 39,681.09-54,759.75-21,776.40

Finding the Fourth Proportional to 39,681.09, 54,759.75 and 21,776.40

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Solution

The fourth proportional to 39,681.09, 54,759.75 and 21,776.40 is: 30,051.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,681.09 : 54,759.75 = 21,776.40 : x
  2. Step 2: Convert to fraction form
    39,681.09/54,759.75 = 21,776.40/x
  3. Step 3: Cross multiply
    39,681.09x = 54,759.75 × 21,776.40
  4. Step 4: Simplify right side
    39,681.09x = 1,192,470,219.90
  5. Step 5: Solve for x
    x = 1,192,470,219.90/39,681.09
  6. Step 6: Final answer
    x = 30,051.35

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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.