Home / 21,223.58-29,275.51-12,603.90

Finding the Fourth Proportional to 21,223.58, 29,275.51 and 12,603.90

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Solution

The fourth proportional to 21,223.58, 29,275.51 and 12,603.90 is: 17,385.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,223.58 : 29,275.51 = 12,603.90 : x
  2. Step 2: Convert to fraction form
    21,223.58/29,275.51 = 12,603.90/x
  3. Step 3: Cross multiply
    21,223.58x = 29,275.51 × 12,603.90
  4. Step 4: Simplify right side
    21,223.58x = 368,985,675.81
  5. Step 5: Solve for x
    x = 368,985,675.81/21,223.58
  6. Step 6: Final answer
    x = 17,385.65

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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.