Home / 28,715.98-39,628.18-15,970.32

Finding the Fourth Proportional to 28,715.98, 39,628.18 and 15,970.32

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Solution

The fourth proportional to 28,715.98, 39,628.18 and 15,970.32 is: 22,039.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,715.98 : 39,628.18 = 15,970.32 : x
  2. Step 2: Convert to fraction form
    28,715.98/39,628.18 = 15,970.32/x
  3. Step 3: Cross multiply
    28,715.98x = 39,628.18 × 15,970.32
  4. Step 4: Simplify right side
    28,715.98x = 632,874,715.62
  5. Step 5: Solve for x
    x = 632,874,715.62/28,715.98
  6. Step 6: Final answer
    x = 22,039.11

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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.