Home / 28,666.77-39,558.81-15,920.77

Finding the Fourth Proportional to 28,666.77, 39,558.81 and 15,920.77

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Solution

The fourth proportional to 28,666.77, 39,558.81 and 15,920.77 is: 21,969.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,666.77 : 39,558.81 = 15,920.77 : x
  2. Step 2: Convert to fraction form
    28,666.77/39,558.81 = 15,920.77/x
  3. Step 3: Cross multiply
    28,666.77x = 39,558.81 × 15,920.77
  4. Step 4: Simplify right side
    28,666.77x = 629,806,715.48
  5. Step 5: Solve for x
    x = 629,806,715.48/28,666.77
  6. Step 6: Final answer
    x = 21,969.92

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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.