Home / 30,417.78-42,005.52-28,761.24

Finding the Fourth Proportional to 30,417.78, 42,005.52 and 28,761.24

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Solution

The fourth proportional to 30,417.78, 42,005.52 and 28,761.24 is: 39,717.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,417.78 : 42,005.52 = 28,761.24 : x
  2. Step 2: Convert to fraction form
    30,417.78/42,005.52 = 28,761.24/x
  3. Step 3: Cross multiply
    30,417.78x = 42,005.52 × 28,761.24
  4. Step 4: Simplify right side
    30,417.78x = 1,208,130,842.04
  5. Step 5: Solve for x
    x = 1,208,130,842.04/30,417.78
  6. Step 6: Final answer
    x = 39,717.92

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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.