Home / 38,686.32-53,384.40-21,689.28

Finding the Fourth Proportional to 38,686.32, 53,384.40 and 21,689.28

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Solution

The fourth proportional to 38,686.32, 53,384.40 and 21,689.28 is: 29,929.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,686.32 : 53,384.40 = 21,689.28 : x
  2. Step 2: Convert to fraction form
    38,686.32/53,384.40 = 21,689.28/x
  3. Step 3: Cross multiply
    38,686.32x = 53,384.40 × 21,689.28
  4. Step 4: Simplify right side
    38,686.32x = 1,157,869,199.23
  5. Step 5: Solve for x
    x = 1,157,869,199.23/38,686.32
  6. Step 6: Final answer
    x = 29,929.68

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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.