Home / 30,499,308.59-42,018,807.54-21,071,067.52

Finding the Fourth Proportional to 30,499,308.59, 42,018,807.54 and 21,071,067.52

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Solution

The fourth proportional to 30,499,308.59, 42,018,807.54 and 21,071,067.52 is: 29,029,547.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,499,308.59 : 42,018,807.54 = 21,071,067.52 : x
  2. Step 2: Convert to fraction form
    30,499,308.59/42,018,807.54 = 21,071,067.52/x
  3. Step 3: Cross multiply
    30,499,308.59x = 42,018,807.54 × 21,071,067.52
  4. Step 4: Simplify right side
    30,499,308.59x = 885,381,130,837,417.50
  5. Step 5: Solve for x
    x = 885,381,130,837,417.50/30,499,308.59
  6. Step 6: Final answer
    x = 29,029,547.62

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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.