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Finding the Fourth Proportional to 15,643.80, 23,465.70 and 14,258.70

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Solution

The fourth proportional to 15,643.80, 23,465.70 and 14,258.70 is: 21,388.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,643.80 : 23,465.70 = 14,258.70 : x
  2. Step 2: Convert to fraction form
    15,643.80/23,465.70 = 14,258.70/x
  3. Step 3: Cross multiply
    15,643.80x = 23,465.70 × 14,258.70
  4. Step 4: Simplify right side
    15,643.80x = 334,590,376.59
  5. Step 5: Solve for x
    x = 334,590,376.59/15,643.80
  6. Step 6: Final answer
    x = 21,388.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.