Home / 28,005.60-38,646.80-15,430.32

Finding the Fourth Proportional to 28,005.60, 38,646.80 and 15,430.32

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Solution

The fourth proportional to 28,005.60, 38,646.80 and 15,430.32 is: 21,293.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,005.60 : 38,646.80 = 15,430.32 : x
  2. Step 2: Convert to fraction form
    28,005.60/38,646.80 = 15,430.32/x
  3. Step 3: Cross multiply
    28,005.60x = 38,646.80 × 15,430.32
  4. Step 4: Simplify right side
    28,005.60x = 596,332,490.98
  5. Step 5: Solve for x
    x = 596,332,490.98/28,005.60
  6. Step 6: Final answer
    x = 21,293.33

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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.