Home / 28,461.05-39,275.79-15,715.54

Finding the Fourth Proportional to 28,461.05, 39,275.79 and 15,715.54

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Solution

The fourth proportional to 28,461.05, 39,275.79 and 15,715.54 is: 21,687.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,461.05 : 39,275.79 = 15,715.54 : x
  2. Step 2: Convert to fraction form
    28,461.05/39,275.79 = 15,715.54/x
  3. Step 3: Cross multiply
    28,461.05x = 39,275.79 × 15,715.54
  4. Step 4: Simplify right side
    28,461.05x = 617,240,349.40
  5. Step 5: Solve for x
    x = 617,240,349.40/28,461.05
  6. Step 6: Final answer
    x = 21,687.20

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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.