Home / 18,934.21-26,130.09-10,978.93

Finding the Fourth Proportional to 18,934.21, 26,130.09 and 10,978.93

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Solution

The fourth proportional to 18,934.21, 26,130.09 and 10,978.93 is: 15,151.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,934.21 : 26,130.09 = 10,978.93 : x
  2. Step 2: Convert to fraction form
    18,934.21/26,130.09 = 10,978.93/x
  3. Step 3: Cross multiply
    18,934.21x = 26,130.09 × 10,978.93
  4. Step 4: Simplify right side
    18,934.21x = 286,880,429.00
  5. Step 5: Solve for x
    x = 286,880,429.00/18,934.21
  6. Step 6: Final answer
    x = 15,151.43

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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.