Home / 21,275.32-31,916.24-7,421.08

Finding the Fourth Proportional to 21,275.32, 31,916.24 and 7,421.08

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Solution

The fourth proportional to 21,275.32, 31,916.24 and 7,421.08 is: 11,132.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,275.32 : 31,916.24 = 7,421.08 : x
  2. Step 2: Convert to fraction form
    21,275.32/31,916.24 = 7,421.08/x
  3. Step 3: Cross multiply
    21,275.32x = 31,916.24 × 7,421.08
  4. Step 4: Simplify right side
    21,275.32x = 236,852,970.34
  5. Step 5: Solve for x
    x = 236,852,970.34/21,275.32
  6. Step 6: Final answer
    x = 11,132.76

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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.