Home / 28,572.40-42,830.25-14,490.55

Finding the Fourth Proportional to 28,572.40, 42,830.25 and 14,490.55

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Solution

The fourth proportional to 28,572.40, 42,830.25 and 14,490.55 is: 21,721.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,572.40 : 42,830.25 = 14,490.55 : x
  2. Step 2: Convert to fraction form
    28,572.40/42,830.25 = 14,490.55/x
  3. Step 3: Cross multiply
    28,572.40x = 42,830.25 × 14,490.55
  4. Step 4: Simplify right side
    28,572.40x = 620,633,879.14
  5. Step 5: Solve for x
    x = 620,633,879.14/28,572.40
  6. Step 6: Final answer
    x = 21,721.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.