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Finding the Fourth Proportional to 21,166.88, 31,856.63 and 15,929.01

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Solution

The fourth proportional to 21,166.88, 31,856.63 and 15,929.01 is: 23,973.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,166.88 : 31,856.63 = 15,929.01 : x
  2. Step 2: Convert to fraction form
    21,166.88/31,856.63 = 15,929.01/x
  3. Step 3: Cross multiply
    21,166.88x = 31,856.63 × 15,929.01
  4. Step 4: Simplify right side
    21,166.88x = 507,444,587.79
  5. Step 5: Solve for x
    x = 507,444,587.79/21,166.88
  6. Step 6: Final answer
    x = 23,973.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.