Home / 21,284.18-29,358.10-13,312.56

Finding the Fourth Proportional to 21,284.18, 29,358.10 and 13,312.56

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Solution

The fourth proportional to 21,284.18, 29,358.10 and 13,312.56 is: 18,362.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,284.18 : 29,358.10 = 13,312.56 : x
  2. Step 2: Convert to fraction form
    21,284.18/29,358.10 = 13,312.56/x
  3. Step 3: Cross multiply
    21,284.18x = 29,358.10 × 13,312.56
  4. Step 4: Simplify right side
    21,284.18x = 390,831,467.74
  5. Step 5: Solve for x
    x = 390,831,467.74/21,284.18
  6. Step 6: Final answer
    x = 18,362.53

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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.