Home / 21,315.48-29,402.32-14,145.76

Finding the Fourth Proportional to 21,315.48, 29,402.32 and 14,145.76

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Solution

The fourth proportional to 21,315.48, 29,402.32 and 14,145.76 is: 19,512.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.48 : 29,402.32 = 14,145.76 : x
  2. Step 2: Convert to fraction form
    21,315.48/29,402.32 = 14,145.76/x
  3. Step 3: Cross multiply
    21,315.48x = 29,402.32 × 14,145.76
  4. Step 4: Simplify right side
    21,315.48x = 415,918,162.16
  5. Step 5: Solve for x
    x = 415,918,162.16/21,315.48
  6. Step 6: Final answer
    x = 19,512.49

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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.