Home / 28,878.56-39,840.36-19,430.72

Finding the Fourth Proportional to 28,878.56, 39,840.36 and 19,430.72

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Solution

The fourth proportional to 28,878.56, 39,840.36 and 19,430.72 is: 26,806.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,878.56 : 39,840.36 = 19,430.72 : x
  2. Step 2: Convert to fraction form
    28,878.56/39,840.36 = 19,430.72/x
  3. Step 3: Cross multiply
    28,878.56x = 39,840.36 × 19,430.72
  4. Step 4: Simplify right side
    28,878.56x = 774,126,879.86
  5. Step 5: Solve for x
    x = 774,126,879.86/28,878.56
  6. Step 6: Final answer
    x = 26,806.28

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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.