Home / 21,055.95-31,576.23-7,904.79

Finding the Fourth Proportional to 21,055.95, 31,576.23 and 7,904.79

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Solution

The fourth proportional to 21,055.95, 31,576.23 and 7,904.79 is: 11,854.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,055.95 : 31,576.23 = 7,904.79 : x
  2. Step 2: Convert to fraction form
    21,055.95/31,576.23 = 7,904.79/x
  3. Step 3: Cross multiply
    21,055.95x = 31,576.23 × 7,904.79
  4. Step 4: Simplify right side
    21,055.95x = 249,603,467.14
  5. Step 5: Solve for x
    x = 249,603,467.14/21,055.95
  6. Step 6: Final answer
    x = 11,854.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.