Home / 19,981.98-27,585.14-12,430.76

Finding the Fourth Proportional to 19,981.98, 27,585.14 and 12,430.76

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Solution

The fourth proportional to 19,981.98, 27,585.14 and 12,430.76 is: 17,160.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,981.98 : 27,585.14 = 12,430.76 : x
  2. Step 2: Convert to fraction form
    19,981.98/27,585.14 = 12,430.76/x
  3. Step 3: Cross multiply
    19,981.98x = 27,585.14 × 12,430.76
  4. Step 4: Simplify right side
    19,981.98x = 342,904,054.83
  5. Step 5: Solve for x
    x = 342,904,054.83/19,981.98
  6. Step 6: Final answer
    x = 17,160.66

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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.