Home / 15,830.21-21,845.90-9,117.02

Finding the Fourth Proportional to 15,830.21, 21,845.90 and 9,117.02

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Solution

The fourth proportional to 15,830.21, 21,845.90 and 9,117.02 is: 12,581.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,830.21 : 21,845.90 = 9,117.02 : x
  2. Step 2: Convert to fraction form
    15,830.21/21,845.90 = 9,117.02/x
  3. Step 3: Cross multiply
    15,830.21x = 21,845.90 × 9,117.02
  4. Step 4: Simplify right side
    15,830.21x = 199,169,352.40
  5. Step 5: Solve for x
    x = 199,169,352.40/15,830.21
  6. Step 6: Final answer
    x = 12,581.60

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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.