Home / 28,145.50-38,842.02-15,570.25

Finding the Fourth Proportional to 28,145.50, 38,842.02 and 15,570.25

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Solution

The fourth proportional to 28,145.50, 38,842.02 and 15,570.25 is: 21,487.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,145.50 : 38,842.02 = 15,570.25 : x
  2. Step 2: Convert to fraction form
    28,145.50/38,842.02 = 15,570.25/x
  3. Step 3: Cross multiply
    28,145.50x = 38,842.02 × 15,570.25
  4. Step 4: Simplify right side
    28,145.50x = 604,779,961.91
  5. Step 5: Solve for x
    x = 604,779,961.91/28,145.50
  6. Step 6: Final answer
    x = 21,487.63

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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.