Home / 9,001.79-12,419.00-5,638.74

Finding the Fourth Proportional to 9,001.79, 12,419.00 and 5,638.74

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Solution

The fourth proportional to 9,001.79, 12,419.00 and 5,638.74 is: 7,779.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,001.79 : 12,419.00 = 5,638.74 : x
  2. Step 2: Convert to fraction form
    9,001.79/12,419.00 = 5,638.74/x
  3. Step 3: Cross multiply
    9,001.79x = 12,419.00 × 5,638.74
  4. Step 4: Simplify right side
    9,001.79x = 70,027,551.58
  5. Step 5: Solve for x
    x = 70,027,551.58/9,001.79
  6. Step 6: Final answer
    x = 7,779.30

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Half scale
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Double scale
Find fourth proportional to 9,002.79, 12,420.38 and 5,639.74
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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.