Home / 15,430.04-21,293.28-8,715.68

Finding the Fourth Proportional to 15,430.04, 21,293.28 and 8,715.68

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Solution

The fourth proportional to 15,430.04, 21,293.28 and 8,715.68 is: 12,027.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,430.04 : 21,293.28 = 8,715.68 : x
  2. Step 2: Convert to fraction form
    15,430.04/21,293.28 = 8,715.68/x
  3. Step 3: Cross multiply
    15,430.04x = 21,293.28 × 8,715.68
  4. Step 4: Simplify right side
    15,430.04x = 185,585,308.16
  5. Step 5: Solve for x
    x = 185,585,308.16/15,430.04
  6. Step 6: Final answer
    x = 12,027.54

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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.