Home / 21,406.32-29,547.12-12,457.92

Finding the Fourth Proportional to 21,406.32, 29,547.12 and 12,457.92

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Solution

The fourth proportional to 21,406.32, 29,547.12 and 12,457.92 is: 17,195.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,406.32 : 29,547.12 = 12,457.92 : x
  2. Step 2: Convert to fraction form
    21,406.32/29,547.12 = 12,457.92/x
  3. Step 3: Cross multiply
    21,406.32x = 29,547.12 × 12,457.92
  4. Step 4: Simplify right side
    21,406.32x = 368,095,657.19
  5. Step 5: Solve for x
    x = 368,095,657.19/21,406.32
  6. Step 6: Final answer
    x = 17,195.65

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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.