Home / 27,812.81-38,384.43-15,877.94

Finding the Fourth Proportional to 27,812.81, 38,384.43 and 15,877.94

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Solution

The fourth proportional to 27,812.81, 38,384.43 and 15,877.94 is: 21,913.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,812.81 : 38,384.43 = 15,877.94 : x
  2. Step 2: Convert to fraction form
    27,812.81/38,384.43 = 15,877.94/x
  3. Step 3: Cross multiply
    27,812.81x = 38,384.43 × 15,877.94
  4. Step 4: Simplify right side
    27,812.81x = 609,465,676.47
  5. Step 5: Solve for x
    x = 609,465,676.47/27,812.81
  6. Step 6: Final answer
    x = 21,913.13

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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.