Home / 18,939.61-26,136.40-10,981.63

Finding the Fourth Proportional to 18,939.61, 26,136.40 and 10,981.63

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Solution

The fourth proportional to 18,939.61, 26,136.40 and 10,981.63 is: 15,154.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.61 : 26,136.40 = 10,981.63 : x
  2. Step 2: Convert to fraction form
    18,939.61/26,136.40 = 10,981.63/x
  3. Step 3: Cross multiply
    18,939.61x = 26,136.40 × 10,981.63
  4. Step 4: Simplify right side
    18,939.61x = 287,020,274.33
  5. Step 5: Solve for x
    x = 287,020,274.33/18,939.61
  6. Step 6: Final answer
    x = 15,154.50

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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.