Home / 20,054.57-27,681.30-12,981.47

Finding the Fourth Proportional to 20,054.57, 27,681.30 and 12,981.47

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Solution

The fourth proportional to 20,054.57, 27,681.30 and 12,981.47 is: 17,918.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,054.57 : 27,681.30 = 12,981.47 : x
  2. Step 2: Convert to fraction form
    20,054.57/27,681.30 = 12,981.47/x
  3. Step 3: Cross multiply
    20,054.57x = 27,681.30 × 12,981.47
  4. Step 4: Simplify right side
    20,054.57x = 359,343,827.10
  5. Step 5: Solve for x
    x = 359,343,827.10/20,054.57
  6. Step 6: Final answer
    x = 17,918.31

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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.