Home / 15,386.60-21,222.95-9,421.22

Finding the Fourth Proportional to 15,386.60, 21,222.95 and 9,421.22

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Solution

The fourth proportional to 15,386.60, 21,222.95 and 9,421.22 is: 12,994.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,386.60 : 21,222.95 = 9,421.22 : x
  2. Step 2: Convert to fraction form
    15,386.60/21,222.95 = 9,421.22/x
  3. Step 3: Cross multiply
    15,386.60x = 21,222.95 × 9,421.22
  4. Step 4: Simplify right side
    15,386.60x = 199,945,927.78
  5. Step 5: Solve for x
    x = 199,945,927.78/15,386.60
  6. Step 6: Final answer
    x = 12,994.81

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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.