Home / 27,810.72-38,386.84-15,880.56

Finding the Fourth Proportional to 27,810.72, 38,386.84 and 15,880.56

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Solution

The fourth proportional to 27,810.72, 38,386.84 and 15,880.56 is: 21,919.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,810.72 : 38,386.84 = 15,880.56 : x
  2. Step 2: Convert to fraction form
    27,810.72/38,386.84 = 15,880.56/x
  3. Step 3: Cross multiply
    27,810.72x = 38,386.84 × 15,880.56
  4. Step 4: Simplify right side
    27,810.72x = 609,604,515.83
  5. Step 5: Solve for x
    x = 609,604,515.83/27,810.72
  6. Step 6: Final answer
    x = 21,919.77

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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.