Home / 15,316.90-21,139.28-9,347.30

Finding the Fourth Proportional to 15,316.90, 21,139.28 and 9,347.30

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Solution

The fourth proportional to 15,316.90, 21,139.28 and 9,347.30 is: 12,900.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,316.90 : 21,139.28 = 9,347.30 : x
  2. Step 2: Convert to fraction form
    15,316.90/21,139.28 = 9,347.30/x
  3. Step 3: Cross multiply
    15,316.90x = 21,139.28 × 9,347.30
  4. Step 4: Simplify right side
    15,316.90x = 197,595,145.21
  5. Step 5: Solve for x
    x = 197,595,145.21/15,316.90
  6. Step 6: Final answer
    x = 12,900.47

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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.