Home / 28,139.84-38,832.50-15,564.58

Finding the Fourth Proportional to 28,139.84, 38,832.50 and 15,564.58

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Solution

The fourth proportional to 28,139.84, 38,832.50 and 15,564.58 is: 21,478.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.84 : 38,832.50 = 15,564.58 : x
  2. Step 2: Convert to fraction form
    28,139.84/38,832.50 = 15,564.58/x
  3. Step 3: Cross multiply
    28,139.84x = 38,832.50 × 15,564.58
  4. Step 4: Simplify right side
    28,139.84x = 604,411,552.85
  5. Step 5: Solve for x
    x = 604,411,552.85/28,139.84
  6. Step 6: Final answer
    x = 21,478.86

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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.