Home / 15,689.54-21,639.57-10,657.64

Finding the Fourth Proportional to 15,689.54, 21,639.57 and 10,657.64

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Solution

The fourth proportional to 15,689.54, 21,639.57 and 10,657.64 is: 14,699.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,689.54 : 21,639.57 = 10,657.64 : x
  2. Step 2: Convert to fraction form
    15,689.54/21,639.57 = 10,657.64/x
  3. Step 3: Cross multiply
    15,689.54x = 21,639.57 × 10,657.64
  4. Step 4: Simplify right side
    15,689.54x = 230,626,746.81
  5. Step 5: Solve for x
    x = 230,626,746.81/15,689.54
  6. Step 6: Final answer
    x = 14,699.40

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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.