Home / 14,720.64-20,320.88-10,242.75

Finding the Fourth Proportional to 14,720.64, 20,320.88 and 10,242.75

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Solution

The fourth proportional to 14,720.64, 20,320.88 and 10,242.75 is: 14,139.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,720.64 : 20,320.88 = 10,242.75 : x
  2. Step 2: Convert to fraction form
    14,720.64/20,320.88 = 10,242.75/x
  3. Step 3: Cross multiply
    14,720.64x = 20,320.88 × 10,242.75
  4. Step 4: Simplify right side
    14,720.64x = 208,141,718.61
  5. Step 5: Solve for x
    x = 208,141,718.61/14,720.64
  6. Step 6: Final answer
    x = 14,139.45

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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.