Home / 21,478.15-29,644.95-12,530.08

Finding the Fourth Proportional to 21,478.15, 29,644.95 and 12,530.08

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Solution

The fourth proportional to 21,478.15, 29,644.95 and 12,530.08 is: 17,294.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,478.15 : 29,644.95 = 12,530.08 : x
  2. Step 2: Convert to fraction form
    21,478.15/29,644.95 = 12,530.08/x
  3. Step 3: Cross multiply
    21,478.15x = 29,644.95 × 12,530.08
  4. Step 4: Simplify right side
    21,478.15x = 371,453,595.10
  5. Step 5: Solve for x
    x = 371,453,595.10/21,478.15
  6. Step 6: Final answer
    x = 17,294.49

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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.