Home / 28,354.91-39,130.02-15,779.66

Finding the Fourth Proportional to 28,354.91, 39,130.02 and 15,779.66

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Solution

The fourth proportional to 28,354.91, 39,130.02 and 15,779.66 is: 21,776.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,354.91 : 39,130.02 = 15,779.66 : x
  2. Step 2: Convert to fraction form
    28,354.91/39,130.02 = 15,779.66/x
  3. Step 3: Cross multiply
    28,354.91x = 39,130.02 × 15,779.66
  4. Step 4: Simplify right side
    28,354.91x = 617,458,215.74
  5. Step 5: Solve for x
    x = 617,458,215.74/28,354.91
  6. Step 6: Final answer
    x = 21,776.06

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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.