Home / 21,106.65-29,127.02-12,612.45

Finding the Fourth Proportional to 21,106.65, 29,127.02 and 12,612.45

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Solution

The fourth proportional to 21,106.65, 29,127.02 and 12,612.45 is: 17,405.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.65 : 29,127.02 = 12,612.45 : x
  2. Step 2: Convert to fraction form
    21,106.65/29,127.02 = 12,612.45/x
  3. Step 3: Cross multiply
    21,106.65x = 29,127.02 × 12,612.45
  4. Step 4: Simplify right side
    21,106.65x = 367,363,020.34
  5. Step 5: Solve for x
    x = 367,363,020.34/21,106.65
  6. Step 6: Final answer
    x = 17,405.08

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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.