Home / 28,354.28-39,130.44-15,779.30

Finding the Fourth Proportional to 28,354.28, 39,130.44 and 15,779.30

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Solution

The fourth proportional to 28,354.28, 39,130.44 and 15,779.30 is: 21,776.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,354.28 : 39,130.44 = 15,779.30 : x
  2. Step 2: Convert to fraction form
    28,354.28/39,130.44 = 15,779.30/x
  3. Step 3: Cross multiply
    28,354.28x = 39,130.44 × 15,779.30
  4. Step 4: Simplify right side
    28,354.28x = 617,450,951.89
  5. Step 5: Solve for x
    x = 617,450,951.89/28,354.28
  6. Step 6: Final answer
    x = 21,776.29

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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.