Home / 27,890.84-38,490.72-15,315.86

Finding the Fourth Proportional to 27,890.84, 38,490.72 and 15,315.86

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Solution

The fourth proportional to 27,890.84, 38,490.72 and 15,315.86 is: 21,136.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,890.84 : 38,490.72 = 15,315.86 : x
  2. Step 2: Convert to fraction form
    27,890.84/38,490.72 = 15,315.86/x
  3. Step 3: Cross multiply
    27,890.84x = 38,490.72 × 15,315.86
  4. Step 4: Simplify right side
    27,890.84x = 589,518,478.82
  5. Step 5: Solve for x
    x = 589,518,478.82/27,890.84
  6. Step 6: Final answer
    x = 21,136.63

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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.