Home / 28,124.12-42,156.77-13,315.39

Finding the Fourth Proportional to 28,124.12, 42,156.77 and 13,315.39

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Solution

The fourth proportional to 28,124.12, 42,156.77 and 13,315.39 is: 19,959.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,124.12 : 42,156.77 = 13,315.39 : x
  2. Step 2: Convert to fraction form
    28,124.12/42,156.77 = 13,315.39/x
  3. Step 3: Cross multiply
    28,124.12x = 42,156.77 × 13,315.39
  4. Step 4: Simplify right side
    28,124.12x = 561,333,973.75
  5. Step 5: Solve for x
    x = 561,333,973.75/28,124.12
  6. Step 6: Final answer
    x = 19,959.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.