Home / 15,875.73-21,891.45-13,385.28

Finding the Fourth Proportional to 15,875.73, 21,891.45 and 13,385.28

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Solution

The fourth proportional to 15,875.73, 21,891.45 and 13,385.28 is: 18,457.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,875.73 : 21,891.45 = 13,385.28 : x
  2. Step 2: Convert to fraction form
    15,875.73/21,891.45 = 13,385.28/x
  3. Step 3: Cross multiply
    15,875.73x = 21,891.45 × 13,385.28
  4. Step 4: Simplify right side
    15,875.73x = 293,023,187.86
  5. Step 5: Solve for x
    x = 293,023,187.86/15,875.73
  6. Step 6: Final answer
    x = 18,457.30

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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.