Home / 38,985.95-53,801.19-21,991.01

Finding the Fourth Proportional to 38,985.95, 53,801.19 and 21,991.01

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Solution

The fourth proportional to 38,985.95, 53,801.19 and 21,991.01 is: 30,347.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,985.95 : 53,801.19 = 21,991.01 : x
  2. Step 2: Convert to fraction form
    38,985.95/53,801.19 = 21,991.01/x
  3. Step 3: Cross multiply
    38,985.95x = 53,801.19 × 21,991.01
  4. Step 4: Simplify right side
    38,985.95x = 1,183,142,238.30
  5. Step 5: Solve for x
    x = 1,183,142,238.30/38,985.95
  6. Step 6: Final answer
    x = 30,347.91

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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.