Home / 28,312.08-39,069.72-15,736.56

Finding the Fourth Proportional to 28,312.08, 39,069.72 and 15,736.56

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Solution

The fourth proportional to 28,312.08, 39,069.72 and 15,736.56 is: 21,715.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,312.08 : 39,069.72 = 15,736.56 : x
  2. Step 2: Convert to fraction form
    28,312.08/39,069.72 = 15,736.56/x
  3. Step 3: Cross multiply
    28,312.08x = 39,069.72 × 15,736.56
  4. Step 4: Simplify right side
    28,312.08x = 614,822,992.96
  5. Step 5: Solve for x
    x = 614,822,992.96/28,312.08
  6. Step 6: Final answer
    x = 21,715.92

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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.