Home / 28,820.64-39,772.50-15,572.64

Finding the Fourth Proportional to 28,820.64, 39,772.50 and 15,572.64

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Solution

The fourth proportional to 28,820.64, 39,772.50 and 15,572.64 is: 21,490.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,820.64 : 39,772.50 = 15,572.64 : x
  2. Step 2: Convert to fraction form
    28,820.64/39,772.50 = 15,572.64/x
  3. Step 3: Cross multiply
    28,820.64x = 39,772.50 × 15,572.64
  4. Step 4: Simplify right side
    28,820.64x = 619,362,824.40
  5. Step 5: Solve for x
    x = 619,362,824.40/28,820.64
  6. Step 6: Final answer
    x = 21,490.25

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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.