Home / 15,501.95-21,392.60-8,428.22

Finding the Fourth Proportional to 15,501.95, 21,392.60 and 8,428.22

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Solution

The fourth proportional to 15,501.95, 21,392.60 and 8,428.22 is: 11,630.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,501.95 : 21,392.60 = 8,428.22 : x
  2. Step 2: Convert to fraction form
    15,501.95/21,392.60 = 8,428.22/x
  3. Step 3: Cross multiply
    15,501.95x = 21,392.60 × 8,428.22
  4. Step 4: Simplify right side
    15,501.95x = 180,301,390.07
  5. Step 5: Solve for x
    x = 180,301,390.07/15,501.95
  6. Step 6: Final answer
    x = 11,630.89

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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.