Finding the Fourth Proportional to 34,138,979.99, 47,115,443.36 and 20,916,931.61
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Solution
The fourth proportional to 34,138,979.99, 47,115,443.36 and 20,916,931.61 is: 28,867,602.57
Step by Step Solution
- Step 1: Write the proportion equation
34,138,979.99 : 47,115,443.36 = 20,916,931.61 : x - Step 2: Convert to fraction form
34,138,979.99/47,115,443.36 = 20,916,931.61/x - Step 3: Cross multiply
34,138,979.99x = 47,115,443.36 × 20,916,931.61 - Step 4: Simplify right side
34,138,979.99x = 985,510,506,300,371.38 - Step 5: Solve for x
x = 985,510,506,300,371.38/34,138,979.99 - Step 6: Final answer
x = 28,867,602.57
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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.