Home / 21,354.32-29,421-14,887.95

Finding the Fourth Proportional to 21,354.32, 29,421 and 14,887.95

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Solution

The fourth proportional to 21,354.32, 29,421 and 14,887.95 is: 20,511.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,354.32 : 29,421 = 14,887.95 : x
  2. Step 2: Convert to fraction form
    21,354.32/29,421 = 14,887.95/x
  3. Step 3: Cross multiply
    21,354.32x = 29,421 × 14,887.95
  4. Step 4: Simplify right side
    21,354.32x = 438,018,376.95
  5. Step 5: Solve for x
    x = 438,018,376.95/21,354.32
  6. Step 6: Final answer
    x = 20,511.94

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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.