Home / 28,355.77-39,130.58-15,780.52

Finding the Fourth Proportional to 28,355.77, 39,130.58 and 15,780.52

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Solution

The fourth proportional to 28,355.77, 39,130.58 and 15,780.52 is: 21,776.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,355.77 : 39,130.58 = 15,780.52 : x
  2. Step 2: Convert to fraction form
    28,355.77/39,130.58 = 15,780.52/x
  3. Step 3: Cross multiply
    28,355.77x = 39,130.58 × 15,780.52
  4. Step 4: Simplify right side
    28,355.77x = 617,500,625.75
  5. Step 5: Solve for x
    x = 617,500,625.75/28,355.77
  6. Step 6: Final answer
    x = 21,776.90

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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.