Home / 27,995.61-38,633.93-15,420.36

Finding the Fourth Proportional to 27,995.61, 38,633.93 and 15,420.36

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Solution

The fourth proportional to 27,995.61, 38,633.93 and 15,420.36 is: 21,280.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,995.61 : 38,633.93 = 15,420.36 : x
  2. Step 2: Convert to fraction form
    27,995.61/38,633.93 = 15,420.36/x
  3. Step 3: Cross multiply
    27,995.61x = 38,633.93 × 15,420.36
  4. Step 4: Simplify right side
    27,995.61x = 595,749,031.71
  5. Step 5: Solve for x
    x = 595,749,031.71/27,995.61
  6. Step 6: Final answer
    x = 21,280.09

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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.