Home / 21,031.07-29,012.85-12,528.32

Finding the Fourth Proportional to 21,031.07, 29,012.85 and 12,528.32

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Solution

The fourth proportional to 21,031.07, 29,012.85 and 12,528.32 is: 17,283.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.07 : 29,012.85 = 12,528.32 : x
  2. Step 2: Convert to fraction form
    21,031.07/29,012.85 = 12,528.32/x
  3. Step 3: Cross multiply
    21,031.07x = 29,012.85 × 12,528.32
  4. Step 4: Simplify right side
    21,031.07x = 363,482,123.85
  5. Step 5: Solve for x
    x = 363,482,123.85/21,031.07
  6. Step 6: Final answer
    x = 17,283.11

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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.