Home / 28,771.38-39,715.65-22,485.78

Finding the Fourth Proportional to 28,771.38, 39,715.65 and 22,485.78

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Solution

The fourth proportional to 28,771.38, 39,715.65 and 22,485.78 is: 31,039.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,771.38 : 39,715.65 = 22,485.78 : x
  2. Step 2: Convert to fraction form
    28,771.38/39,715.65 = 22,485.78/x
  3. Step 3: Cross multiply
    28,771.38x = 39,715.65 × 22,485.78
  4. Step 4: Simplify right side
    28,771.38x = 893,037,368.46
  5. Step 5: Solve for x
    x = 893,037,368.46/28,771.38
  6. Step 6: Final answer
    x = 31,039.09

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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.