Home / 28,528.63-39,366.46-15,779.78

Finding the Fourth Proportional to 28,528.63, 39,366.46 and 15,779.78

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Solution

The fourth proportional to 28,528.63, 39,366.46 and 15,779.78 is: 21,774.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,528.63 : 39,366.46 = 15,779.78 : x
  2. Step 2: Convert to fraction form
    28,528.63/39,366.46 = 15,779.78/x
  3. Step 3: Cross multiply
    28,528.63x = 39,366.46 × 15,779.78
  4. Step 4: Simplify right side
    28,528.63x = 621,194,048.70
  5. Step 5: Solve for x
    x = 621,194,048.70/28,528.63
  6. Step 6: Final answer
    x = 21,774.41

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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.