Home / 28,211.08-38,931.30-15,635.56

Finding the Fourth Proportional to 28,211.08, 38,931.30 and 15,635.56

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Solution

The fourth proportional to 28,211.08, 38,931.30 and 15,635.56 is: 21,577.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,211.08 : 38,931.30 = 15,635.56 : x
  2. Step 2: Convert to fraction form
    28,211.08/38,931.30 = 15,635.56/x
  3. Step 3: Cross multiply
    28,211.08x = 38,931.30 × 15,635.56
  4. Step 4: Simplify right side
    28,211.08x = 608,712,677.03
  5. Step 5: Solve for x
    x = 608,712,677.03/28,211.08
  6. Step 6: Final answer
    x = 21,577.08

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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.