Home / 15,456.80-21,345.48-10,688.96

Finding the Fourth Proportional to 15,456.80, 21,345.48 and 10,688.96

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Solution

The fourth proportional to 15,456.80, 21,345.48 and 10,688.96 is: 14,761.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,456.80 : 21,345.48 = 10,688.96 : x
  2. Step 2: Convert to fraction form
    15,456.80/21,345.48 = 10,688.96/x
  3. Step 3: Cross multiply
    15,456.80x = 21,345.48 × 10,688.96
  4. Step 4: Simplify right side
    15,456.80x = 228,160,981.90
  5. Step 5: Solve for x
    x = 228,160,981.90/15,456.80
  6. Step 6: Final answer
    x = 14,761.20

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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.