Home / 13,145.68-18,130.80-8,430.40

Finding the Fourth Proportional to 13,145.68, 18,130.80 and 8,430.40

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Solution

The fourth proportional to 13,145.68, 18,130.80 and 8,430.40 is: 11,627.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.68 : 18,130.80 = 8,430.40 : x
  2. Step 2: Convert to fraction form
    13,145.68/18,130.80 = 8,430.40/x
  3. Step 3: Cross multiply
    13,145.68x = 18,130.80 × 8,430.40
  4. Step 4: Simplify right side
    13,145.68x = 152,849,896.32
  5. Step 5: Solve for x
    x = 152,849,896.32/13,145.68
  6. Step 6: Final answer
    x = 11,627.39

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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.